`
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`
`
`
` UNITED STATES PATENT AND TRADEMARK OFFICE
`
`_____________________
`
`BEFORE THE PATENT TRIAL AND APPEAL BOARD
`
`_____________________
`
`TCL INDUSTRIES HOLDINGS CO., LTD., HISENSE CO., LTD., AND ZYXEL
`COMMUNICATIONS CORP.
`Petitioners,
`
`v.
`
`PARKERVISION, INC.
`Patent Owner
`
`___________________________
`
`Case No. IPR2021-00985
`
`___________________________
`
`
`
`PETITION FOR INTER PARTES REVIEW
`
`OF
`
`U.S. PATENT NO. 7,292,835
`
`
`
`

`

`
`
`TABLE OF CONTENTS
`
`
`I.
`
`INTRODUCTION ........................................................................................... 1
`
`A.
`
`B.
`
`C.
`
`D.
`
`The ’835 Patent ....................................................................................................1
`
`The Claims Are Obvious Over Hulkko in View of Gibson .....................4
`
`The Claims Are Obvious Over Gibson in View of Schiltz ......................8
`
`Claim 1 Preamble: “Cable Modem” .............................................................11
`
`II. MANDATORY NOTICES ........................................................................... 13
`
`A.
`
`B.
`
`C.
`
`D.
`
`Real Party-in-Interest .......................................................................................13
`
`Related Matters ..................................................................................................13
`
`Counsel ................................................................................................................14
`
`Service Information ..........................................................................................15
`
`III. CERTIFICATION OF GROUNDS FOR STANDING ................................ 15
`
`IV. OVERVIEW OF CHALLENGE AND RELIEF REQUESTED .................. 16
`
`A.
`
`Prior Art ...............................................................................................................16
`
`B. Grounds for Challenge .....................................................................................17
`
`V.
`
`BACKGROUND TECHNOLOGY ............................................................... 18
`
`A. Wireless Communications Signals ...............................................................18
`
`B.
`
`“Modulating” Signals for Wireless Communications..............................19
`
`1.
`
`2.
`
`3.
`
`Amplitude Modulation .............................................................. 20
`
`Phase Modulation ...................................................................... 21
`
`Quadrature Amplitude Modulation (“QAM”) .......................... 22
`
`VI. OVERVIEW OF THE ’835 PATENT .......................................................... 25
`
`i
`
`

`

`
`
`TABLE OF CONTENTS
`
`
`I.
`
`INTRODUCTION ........................................................................................... 1
`
`A.
`
`B.
`
`C.
`
`D.
`
`The ’835 Patent ....................................................................................................1
`
`The Claims Are Obvious Over Hulkko in View of Gibson .....................4
`
`The Claims Are Obvious Over Gibson in View of Schiltz ......................8
`
`Claim 1 Preamble: “Cable Modem” .............................................................11
`
`II. MANDATORY NOTICES ........................................................................... 13
`
`A.
`
`B.
`
`C.
`
`D.
`
`Real Party-in-Interest .......................................................................................13
`
`Related Matters ..................................................................................................13
`
`Counsel ................................................................................................................14
`
`Service Information ..........................................................................................15
`
`III. CERTIFICATION OF GROUNDS FOR STANDING ................................ 15
`
`IV. OVERVIEW OF CHALLENGE AND RELIEF REQUESTED .................. 16
`
`A.
`
`Prior Art ...............................................................................................................16
`
`B. Grounds for Challenge .....................................................................................17
`
`V.
`
`BACKGROUND TECHNOLOGY ............................................................... 18
`
`A. Wireless Communications Signals ...............................................................18
`
`B.
`
`“Modulating” Signals for Wireless Communications..............................19
`
`1.
`
`2.
`
`3.
`
`Amplitude Modulation .............................................................. 20
`
`Phase Modulation ...................................................................... 21
`
`Quadrature Amplitude Modulation (“QAM”) .......................... 22
`
`VI. OVERVIEW OF THE ’835 PATENT .......................................................... 25
`
`i
`
`

`

`
`
`A. Alleged Problem ................................................................................................25
`
`B. Alleged Invention ..............................................................................................25
`
`C.
`
`The Examiner Did Not Consider or Analyze the Primary
`References Presented in This Petition During Original Prosecution ...30
`
`VII. CLAIM CONSTRUCTION .......................................................................... 31
`
`A.
`
`B.
`
`C.
`
`“cable modem” (Claim 1, Preamble) ...........................................................31
`
`“frequency translation module” (Claims 1, 18) .........................................32
`
`“storage module” (Claims 1, 18) ...................................................................34
`
`VIII. OVERVIEW OF THE PRIOR ART REFERENCES ................................... 35
`
`A. Hulkko (Ex. 1004) ............................................................................................35
`
`B. Gibson (Ex. 1005) .............................................................................................38
`
`C.
`
`Schiltz (Ex. 1006) .............................................................................................39
`
`D. DOCSIS References (Goldberg (Ex. 1007), Thacker (Ex. 1008)) .......41
`
`E.
`
`F.
`
`ITU-T J.83b (Ex. 1009) ...................................................................................42
`
`AAPA ...................................................................................................................42
`
`G. Motivation to Combine ....................................................................................43
`
`1.
`
`2.
`
`3.
`
`Ground 1: Hulkko in View of Gibson ...................................... 43
`
`Ground 2: Gibson in View of Schiltz ....................................... 46
`
`“Cable Modem” ........................................................................ 47
`
`IX. LEVEL OF ORDINARY SKILL IN THE ART ........................................... 50
`
`X.
`
`SPECIFIC GROUNDS FOR PETITION ...................................................... 50
`
`A. Ground I: Claims 1, 12, 15, and 17 are Obvious Over Hulkko in
`View of Gibson ..................................................................................................50
`
`1.
`
`Claim 1 ...................................................................................... 51
`
`ii
`
`

`

`
`
`(f)
`
`(a) Element [1 preamble]: “A cable modem for down-
`converting an electromagnetic signal having complex
`modulations, comprising” ...............................................51
`(b) Element [1A]: “an oscillator to generate an in-phase
`oscillating signal” ...........................................................52
`(c) Element [1B]: “a phase shifter to receive said in-
`phase oscillating signal and to create a quadrature-
`phase oscillating signal” .................................................53
`(d) Element [1C]: “a first frequency down-conversion
`module to receive the electromagnetic signal and said
`in-phase oscillating signal” .............................................56
`(e) Element [1D]: “a second frequency down-conversion
`module to receive the electromagnetic signal and said
`quadrature-phase oscillating signal” ...............................57
`Element [1E]: “wherein said first frequency down-
`conversion module further comprises a first
`frequency translation module” .......................................58
`(g) Element [1F]: “and a first storage module” ...................60
`(h) Element [1G]: “wherein said first frequency down-
`conversion module samples the electromagnetic
`signal at a rate that is a function of said in-phase
`oscillating signal, thereby creating a first sampled
`signal” .............................................................................61
`Element [1H]: “said second frequency down-
`conversion module further comprises a second
`frequency translation module” .......................................63
`Element [1I]: “and a second storage module” ................63
`(j)
`(k) Element [1J]: “wherein said second frequency down-
`conversion module samples the electromagnetic
`signal at a rate that is a function of said quadrature-
`phase oscillating signal, thereby creating a second
`sampled signal” ..............................................................64
`
`(i)
`
`
`
`iii
`
`

`

`
`
`2.
`
`3.
`
`4.
`
`Claim 12: “The cable modem of claim 1, wherein said
`sampled signal is a first information output signal, and said
`second sampled signal is a second information output
`signal.” ...................................................................................... 65
`
`Claim 15: “The cable modem of claim 1, further comprising
`a first filter receiving said first sampled signal and
`outputting a first filtered signal, and a second filter
`receiving said second sampled signal and outputting a
`second filtered signal.” .............................................................. 65
`
`Claim 17: “The cable modem of claim 1, wherein the
`electromagnetic signal has been transmitted by a wireless
`method to the cable modem.” ................................................... 66
`
`B. Ground II: Claims 1, 12-15, and 18-20 are Obvious Over Gibson
`in View of Schiltz .............................................................................................67
`
`1.
`
`Claim 1 ...................................................................................... 67
`
`(a) Element [1 preamble]: “A cable modem for down-
`converting an electromagnetic signal having complex
`modulations, comprising” ...............................................67
`(b) Element [1A]: “an oscillator to generate an in-phase
`oscillating signal” ...........................................................69
`(c) Element [1B]: “a phase shifter to receive said in-
`phase oscillating signal and to create a quadrature-
`phase oscillating signal” .................................................69
`(d) Element [1C]: “a first frequency down-conversion
`module to receive the electromagnetic signal and said
`in-phase oscillating signal” .............................................70
`(e) Element [1D]: “a second frequency down-conversion
`module to receive the electromagnetic signal and said
`quadrature-phase oscillating signal” ...............................73
`Element [1E]: “wherein said first frequency down-
`conversion module further comprises a first
`frequency translation module” .......................................74
`(g) Element [1F]: “and a first storage module” ...................75
`
`(f)
`
`iv
`
`

`

`
`
`
`
`(i)
`
`(h) Element [1G]: “wherein said first frequency down-
`conversion module samples the electromagnetic
`signal at a rate that is a function of said in-phase
`oscillating signal, thereby creating a first sampled
`signal” .............................................................................76
`Element [1H]: “said second frequency down-
`conversion module further comprises a second
`frequency translation module” .......................................78
`Element [1I]: “and a second storage module” ................78
`(j)
`(k) Element [1J]: “wherein said second frequency down-
`conversion module samples the electromagnetic
`signal at a rate that is a function of said quadrature-
`phase oscillating signal, thereby creating a second
`sampled signal” ..............................................................79
`
`Claim 12: “The cable modem of claim 1, wherein said
`sampled signal is a first information output signal, and said
`second sampled signal is a second information output
`signal.” ...................................................................................... 80
`
`Claim 13: “The cable modem of claim 1, further comprising
`a first amplifier receiving said first sampled signal and
`outputting a first amplified signal, and a second amplifier
`receiving said second sampled signal and outputting a
`second amplified signal.” .......................................................... 81
`
`Claim 14: “The cable modem of claim 13, further
`comprising a first filter receiving said first amplified signal
`and outputting a first filtered signal, and a second filter
`receiving said second amplified signal and outputting a
`second filtered signal.” .............................................................. 82
`
`Claim 15: “The cable modem of claim 1, further comprising
`a first filter receiving said first sampled signal and
`outputting a first filtered signal, and a second filter
`receiving said second sampled signal and outputting a
`second filtered signal.” .............................................................. 82
`
`2.
`
`3.
`
`4.
`
`5.
`
`v
`
`

`

`
`
`6.
`
`Claim 17: “The cable modem of claim 1, wherein the
`electromagnetic signal has been transmitted by a wireless
`method to the cable modem.” ................................................... 83
`
`7.
`
`Claim 18 .................................................................................... 83
`
`(a) Element [18A]: “The cable modem of claim 1,
`wherein said first frequency translation module
`comprises a first switch coupled to said first storage
`module, and said second frequency translation
`module comprises a second switch coupled to said
`second storage module” ..................................................83
`(b) Element [18B]: “and wherein said first frequency
`down-conversion module further comprises a first
`control signal generator coupled to said first switch
`and coupled to receive said in-phase oscillating
`signal” .............................................................................84
`(c) Element [18C]: “and said second frequency down-
`conversion module further comprises a second
`control signal generator coupled to said second
`switch and coupled to receive said quadrature-phase
`oscillating signal.” ..........................................................84
`
`Claim 19: “The cable modem of claim 18, wherein each of
`said first and second switches comprises: a first port; a
`second port; and a third port.” ................................................... 85
`
`Claim 20: “The cable modem of claim 19, wherein said first
`port of said first switch receives the electromagnetic signal,
`said second port of said first switch receives a first control
`signal generated by said first control signal generator, and
`said third port of said first switch is coupled to said first
`storage device, and wherein said first port of said second
`switch receives the electromagnetic signal, said second port
`of said second switch receives a second control signal
`generated by said second control signal generator, and said
`third port of said second switch is coupled to said second
`storage device.” ......................................................................... 85
`
`
`
`8.
`
`9.
`
`XI. THE BOARD SHOULD INSTITUTE REVIEW ......................................... 85
`
`vi
`
`

`

`
`
`A.
`
`B.
`
`Petitioners Timely Filed This Petition .........................................................85
`
`The Examiner Did Not Consider the Primary References Forming
`the Basis of This Petition ................................................................................89
`
`XII. CONCLUSION .............................................................................................. 89
`
`
`
`
`
`
`vii
`
`

`

`
`
`TABLE OF AUTHORITIES
`
`
`
`Page(s)
`
`Cases
`
`Apple Inc. v. Fintiv, Inc.,
`IPR2020-00019, 2020 WL 2126495 (P.T.A.B. Mar. 20, 2020) ...... 83, 84, 85, 86
`
`Intel Corp. v. ParkerVision Inc.,
`No. IPR2020-01265 ...................................................................................... 84, 86
`
`Koninklijke Philips v. Google,
`948 F.3d 1330, 1337-38 (Fed. Cir. 2020) ........................................................... 42
`
`KSR Int’l Co. v. Teleflex Inc.,
`550 U.S. 398 (2007) ................................................................................ 44, 46, 49
`
`Leapfrog Enters., Inc. v. Fisher-Price, Inc.,
`485 F.3d 1157 (Fed. Cir. 2007) .............................................................. 44, 46, 49
`
`NHK Spring Co. v. Intri-Plex Techs., Inc.,
`No. IPR2018-00752, 2018 WL 4373643 (P.T.A.B. Sept. 12, 2018) ..... 83, 84, 85
`
`Unified Patents, Inc. v. Berman,
`IPR2016-01571, Paper 10 (P.T.A.B. Dec. 14, 2016) ......................................... 86
`
`Statutes
`
`35 U.S.C. §§102(a) and 102(e) ................................................................................ 15
`
`35 U.S.C. §102(b) .............................................................................................. 15, 16
`
`35 U.S.C. §103 ......................................................................................................... 16
`
`35 U.S.C. § 112(6) ............................................................................................. 31, 33
`
`35 U.S.C. §314(a) .................................................................................. 12, 16, 83, 84
`
`35 U.S.C. §325(d) .................................................................................................... 86
`
`Other Authorities
`
`Rule 42.104(a) .......................................................................................................... 14
`
`viii
`
`

`

`Rules 42.22(a)(1) and 42.104(b)(1)-(2) ................................................................... 14
`Rules 42.22(a)(1) and 42.104(b)(1)-(2) ................................................................... 14
`
`
`
`
`
`
`ix
`ix
`
`

`

`
`
`TCL Industries Holdings Co., Ltd., Hisense Co., Ltd., and ZyXEL
`
`Communications Corp. (“Petitioners”) respectfully request inter partes review
`
`(“IPR”) of claims 1, 12-15, and 17-20 (“the challenged claims”) of USP 7,292,835
`
`(“the ’835 patent”) (Ex. 1001).
`
`I.
`
`INTRODUCTION
`
`A. The ’835 Patent
`
`The ’835 patent, which claims a priority date of January 28, 2000, is directed
`
`to a modem for performing down-conversion, a process for converting a high-
`
`frequency signal to a low-frequency signal (called the “baseband signal”) that can
`
`be processed by a device. Down-conversion was admittedly well-known before
`
`the ’835 patent, and the structure recited in the challenged claims for performing
`
`down-conversion was also well-known. Thus, the challenged clams are
`
`unpatentable and should be cancelled.
`
`Electronic devices, like computers and cellphones, process data using
`
`baseband signals. But baseband signals cannot be transmitted wirelessly from one
`
`device to another. Accordingly, a baseband signal must be “modulated” onto a
`
`high-frequency radio-frequency (“RF”) signal called a “carrier” signal to be
`
`transmitted wirelessly. When that high-frequency signal is received by an
`
`electronic device, the receiving device must then “down-convert” the signal back
`
`1
`
`

`

`
`
`to the low-frequency baseband signal, so that the device can process the
`
`transmitted data. This process was known for decades before the ’835 patent.
`
`The challenged claims recite a basic structure for performing down-
`
`conversion. Figure 54B (below)1 shows a modem (5402) that receives an
`
`electromagnetic signal 5416, with the received signal 5416 comprising information
`
`“modulated with an RF carrier signal” (Ex. 1001 at 42:43-43:57):2
`
`Ex. 1001-’835, Fig. 54B
`
`
`
`
`1 All annotations and emphasis have been added unless otherwise noted.
`
`2 The amplifiers and filters shown in Figure 54B are “optional” structures. (Ex. 1001
`at 43:35-42.)
`
`2
`
`

`

`
`
`This received electromagnetic signal (purple) is processed by two modules: a first
`
`frequency down-conversion module 5422 (red) and a second frequency down-
`
`conversion module 5424 (green). In addition to the two down-conversion
`
`modules, the structure of the challenged claims includes an oscillator 5426 (pink)
`
`that generates an in-phase oscillating signal 5434 (pink), and a phase-shifter 5428
`
`(orange) that receives the in-phase oscillating signal and outputs a quadrature-
`
`phase oscillating signal 5436 (orange). The first frequency down-conversion
`
`module 5422 (red) receives the RF signal 5416 and the in-phase oscillating signal
`
`5434, while the second frequency down-conversion module 5424 (green) receives
`
`the RF signal 5416 and the quadrature-phase oscillating signal 5436.
`
`Each of the two frequency down-conversion modules of Figure 54B above
`
`comprises a frequency translation module (e.g., a switch, blue) and a storage
`
`module (e.g., a capacitor, brown), as shown for example in Figures 20A, 20A-1:
`
`
`
`3
`
`

`

`
`
`Ex. 1000-’835 patent Fig. 20A
`
`Ex. 1000-’835 patent Fig. 20A-1
`
`
`
`In Figure 54B of the ’835 patent, discussed previously, the first-frequency
`
`translation module 5422 “samples” the RF signal 5416 at a rate that is a function of
`
`the in-phase oscillating signal 5434, creating a down-converted in-phase signal
`
`5438 (yellow). Similarly, the second frequency translation module 5424 samples
`
`the RF signal 5416 at a rate that is a function of the quadrature-phase oscillating
`
`signal 5436, creating a down-converted quadrature-phase signal 5440 (gray). (Ex.
`
`1002-Decl.¶¶62-67.).
`
`B.
`
`The Claims Are Obvious Over Hulkko in View of Gibson
`
`The structure of the challenged claims depicted above was well-known in
`
`the prior art—including references that were not cited or discussed during original
`
`4
`
`

`

`
`
`prosecution. For example, USP 5,734,683 (“Hulkko”) (Ex. 1004) discloses and/or
`
`renders obvious all the claimed features. Just like Figure 54B of the ’835 patent,
`
`Figure 2 of Hulkko below shows first and second frequency down-conversion
`
`modules (red and green, respectively), a local oscillator (pink) to create an in-phase
`
`oscillating signal, and a phase-shifter (orange) to create a quadrature-phase
`
`oscillating signal:3
`
`Ex. 1004-Hulkko, Fig. 2.
`
`
`
`
`3 Hulkko discloses that control signals PHI3 and PHI4 are 90 degrees out of phase
`with each other. (Ex. 1004 at 4:5-9.).
`
`5
`
`

`

`
`
`And as recited in the challenged claims (and depicted for example in the
`
`’835 patent at Figures 20A and 20A-1, shown above), Hulkko discloses in its
`
`Figure 4 that each of the two frequency down-conversion modules shown in
`
`Hulkko’s Figure 2 includes a first frequency translation module (switch 31, blue)
`
`and a storage module (capacitor 30, brown):
`
`Ex. 1004-Hulko, Fig. 4.
`
`
`
`Hulkko’s frequency translation modules perform down conversion by sampling the
`
`input signal using a switched capacitor, just like the alleged invention disclosed
`
`and claimed in the ’835 patent. In particular, Hulkko discloses that the “mixer 11
`
`can be considered as a sample and a hold circuit that samples the input signal in
`
`synchronization with the oscillator and directs the samples to the output as a signal
`
`which remains constant for the period of the sampling interval.” (Ex. 1004, 5:13-
`
`6
`
`

`

`
`
`17). A “first capacitor 30 is used to sample and hold the incoming signal.” (Id. at
`
`4:61-5:12.). Hulkko discloses that “the inventive idea is realized in the circuit
`
`arrangement … with which switched capacitor switching elements present in the
`
`input stage … are used to implement the mixer 11 which directly demodulates the
`
`IF-signal into a base-frequency signal.” (Id. at Col. 5:39-48).
`
`To the extent that Patent Owner alleges that Hulkko does not disclose the in-
`
`phase and quadrature-phase oscillating signals as recited in claim 1 of the ’835
`
`patent, such arrangement was well-known and is also described, for example, in
`
`USP 4,682,117 (“Gibson”) (Ex. 1005). Gibson describes a modem used to down-
`
`convert a modulated RF signal into an in-phase sampled signal (“I”) and a
`
`quadrature-phase sampled signal (“Q”):
`
`Ex. 1005-Gibson, Fig. 1
`
`
`
`7
`
`

`

`
`
`Just as the local oscillator signal of Hulkko is split to provide two control signals
`
`90 degrees out of phase with each other (see supra Hulkko Fig. 2 at “PHI3” and
`
`“PHI4”; id. at 4:5-9), the local oscillator signal of Gibson (Figure 1, “fL” pink) is
`
`passed through a 90 degree phase-shifter (“π/2” orange) to provide oscillating
`
`signals for respective mixers 10 and 12, with the oscillating signals being 90
`
`degrees out of phase with each other. Accordingly, Hulkko in view of Gibson
`
`renders the claimed invention obvious. (Ex. 1002-Decl.¶¶68-80.).
`
`C. The Claims Are Obvious Over Gibson in View of Schiltz
`
`Gibson (Ex. 1005) was not cited during original prosecution, and also
`
`renders the challenged claims obvious in view of USP 5,339,459 (“Schiltz”) (Ex.
`
`1006). Just like Figure 54B of the ’835 patent (shown above), Figure 1 of Gibson
`
`shows two frequency down-conversion modules (red and green), a local oscillator
`
`(pink), and a phase-shifter (orange).
`
`8
`
`

`

`
`
`
`
`Gibson does not expressly disclose that its frequency down-conversion modules
`
`(mixer 10, red, and mixer 12, green) comprise a switched capacitor arrangement.
`
`However, as recited in the challenged claims (and depicted for example in the ’835
`
`patent at Fig. 20A and 20A-1, shown above), Schiltz discloses a “high speed
`
`sample and hold circuit” comprising a switched capacitor, which circuit is used “as
`
`a mixer.” (Ex. 1006 at 1:5-10; see also id. at 3:45-65, 4:29-32 (“Sample and hold
`
`circuit 26 operates as a downconverter in radio 10. Sample and hold circuit 26
`
`converts a high frequency RF signal into an IF signal in a single operation.”), 6:3-
`
`10 (“Sample and hold circuit 26 … samples the RF signal while the pulses
`
`supplied by pulse generator 30 (see FIG. 1) are active and holds the samples while
`
`the pulses are inactive.”), 7:58-60.).
`
`9
`
`

`

`
`
`The structure of Schiltz’s sample and hold circuit (26) is shown in Figure 5
`
`below, which discloses a mixer featuring a sampling switch 68 (comprising a field
`
`effect transistor 76, blue) and a “hold capacitor” 70 (brown):
`
`Ex. 1006-Schiltz, Fig. 5
`
`
`
`Schiltz discloses that the input electromagnetic signal (purple) enters at contact 74,
`
`which serves as the sampling input and couples to a source of field effect transistor
`
`76 (blue). (Ex. 1006 at 7:58-8:48.). Contact 84 serves as the input for a control
`
`oscillating signal (pink) for the sample and hold circuit 26, and couples to a gate of
`
`field effect transistor 76. (Id.; see also id. at Figure 1 depicting “pulse generator
`
`30.”). Field effect transistor 76 operates as a switch and samples the incoming
`
`signal. (Id. at 7:58-8:48). A drain of field effect transistor 76 serves as the output
`
`10
`
`

`

`
`
`of the sample and hold switch 68, which outputs a sampled signal (yellow). (Id.).
`
`Accordingly, it would have been obvious at the time of the invention to use the
`
`sample and hold circuit of Schiltz for the mixers of Gibson. The combined
`
`structure discloses each and every element of all challenged claims. (Ex. 1002-
`
`Decl.¶¶81-84.).
`
`D. Claim 1 Preamble: “Cable Modem”
`
`As discussed above, both Hulkko in view of Gibson, and Gibson in view of
`
`Schiltz, each discloses or renders obvious the elements recited in the body of each
`
`of the challenged claims (e.g., two frequency down-conversion modules
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`comprising switched capacitors). The preamble of claim 1 of the ’835 patent
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`recites that the modem is a “cable modem,” and the specification teaches that cable
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`modems can be wired or wireless. (Ex. 1001 at 36:50-56; id. at 37:24-30.). To the
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`extent it is argued or determined that the preamble is not merely a statement of
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`intended use of the structure recited in the body of the challenged claims, using the
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`prior art modems discussed above as “cable modems” would have been obvious.
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`The ’835 patent admits that cable modems were “well known devices.” (Ex.
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`1001 at 40:17-35.). Indeed, there existed a number of industry standards for cable
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`data transmission that pre-date the ’835 patent, including the “DOCSIS” (Data
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`Over Cable Service Interface Specification) cable modem standard mentioned in
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`the ’835 specification (Ex. 1001 at 40:8-16), Version 1.0 of which was first
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`released on March 26, 1997, and the ITU-T J.83.b standard released in April 1997.
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`(Ex. 1007; Ex. 1009; Ex. 1008 at 1:30-40.). Version 1.0 of DOCSIS and the J.83
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`Recommendation each specify use of a QAM demodulation technique (Ex. 1007 at
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`5; Ex. 1009 at 1, Table 1), and for the reasons discussed above and below, the
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`receivers of Hulkko and Gibson can each be used to demodulate QAM-modulated
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`signals such as would be received at the customer side of a cable modem. Given
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`that cable modems were admittedly “well known,” and utilize standard QAM
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`demodulation (see Section VIII.D, VIII.E, infra), it would have been obvious to
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`use the receivers of Hulkko (modified by Gibson) or Gibson (modified by Schiltz)
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`as the operative receiving elements of a “cable modem.” Accordingly, the
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`challenged claims are obvious even if the Board finds that the preamble of claim 1
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`is limiting. (Ex. 1002-Decl.¶¶85-88.).
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`* * *
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`For all of the above reasons, Petitioners respectfully request that the Board
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`institute inter partes review and cancel claims 1, 12-15, and 17-20 of the ’835
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`patent. Since the ’835 patent currently is asserted in litigation, in view of § 314(a),
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`Petitioner requests an expedited Notice of Filing Date Accorded.
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`II. MANDATORY NOTICES
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`A. Real Party-in-Interest
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`Petitioners are each real parties-in-interest for this IPR Petition. In addition,
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`the following entities are real parties-in-interest for this particular IPR Petition:
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`TCL Electronics Holdings Ltd.; Shenzhen TCL New Technology Co., Ltd.; TCL
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`King Electrical Appliances (Huizhou) Co., Ltd.; TCL Moka Int’l Ltd.; TCL Moka
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`Manufacturing S.A. DE C.V.; TCL Technology Group Corp.; TTE Technology,
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`Inc.; and Hisense Visual Technology Co., Ltd. (f/k/a Qingdao Hisense Electronics
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`Co., Ltd.4
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`B. Related Matters
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`Petitioner is aware of the following civil actions involving the ’835 patent:
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` ParkerVision, Inc. v. TCL Industries Holdings Co., Ltd. et al, Case 6:20-cv-
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`00945 (WDTX);
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` ParkerVision, Inc. v. Hisense Co., Ltd. et al, Case 6:20-cv-00870 (WDTX);
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`4 ZyXEL Communications Inc. is a U.S. subsidiary of Petitioner ZyXEL
`Communications Corporation that also sells wireless networking products. ZyXEL
`Communications Inc. has not been sued for infringing the ‘835 patent. ZyXEL
`Communications Inc. does not have control over any decisions made by Petition
`ZyXEL Communications Corporation, and has had no input, funding, or
`involvement in the preparation or filing of the current Petition. As such, ZyXEL
`Communication Corp. does not believe that ZyXEL Communications Inc. qualifies
`as a real party in interest to this proceeding. But, in the interest of full disclosure,
`ZyXEL Communications Corporation identifies ZyXEL Communications Inc. to the
`Board.
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` ParkerVision, Inc. v. ZyXEL Communications Corporation, Case 6:20-cv-
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`01010 (WDTX); and
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` ParkerVision, Inc. v. Buffalo Inc., Case 6:20-cv-01009 (WDTX).
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`Additionally, Petitioners plan to file a Petition for inter partes review of U.S.
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`Patent No. 7,110,444 (“the ’444 patent”). Patent Owner owns both the ’444 and
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`’835 patents and is asserting them against Petitioners in the TCL and Hisense
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`Litigations listed above.
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`C. Counsel
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`TCL Lead Counsel:
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`TCL Back-up Counsel:
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`Hisense Lead Counsel:
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`Hisense Back-up Counsel:
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`ZyXEL Lead Counsel:
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`Kristopher L. Reed
`Reg. No. 58,694
`kreed@kilpatricktownsend.com
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`Edward J. Mayle
`Reg. No. 65,444
`tmayle@kilpatricktownsend.com
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`Matias Ferrario
`Reg. No. 51,082
`mferrario@kilpatricktownsend.com
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`Kristopher L. Reed
`Reg. No. 58,6