IPR2022-00246
`U.S. Patent No. 7,292,835
`
`
`
`UNITED STATES PATENT AND TRADEMARK OFFICE
`
`____________
`
`BEFORE THE PATENT TRIAL AND APPEAL BOARD
`
`____________
`
`LG ELECTRONICS INC.,
`
`Petitioner,
`
`v.
`
`PARKERVISION, INC.,
`
`Patent Owner.
`
`____________
`
`Case IPR2022-00246
`
`U.S. Patent No. 7,292,835
`
`____________
`
`PETITION FOR INTER PARTES REVIEW
`
`

`

`IPR2022-00246
`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 .................. 5 
`
`The Claims Are Obvious Over Gibson in View of Schiltz ................... 8 
`
`Claim 1 Preamble: “Cable Modem” ................................................... 11 
`
`II.  MANDATORY NOTICES (§42.8) ............................................................... 12 
`
`A. 
`
`B. 
`
`C. 
`
`Real Party-in-Interest .......................................................................... 12 
`
`Related Matters .................................................................................... 12 
`
`Counsel and Service Information ........................................................ 14 
`
`III.  CERTIFICATION OF GROUNDS FOR STANDING ................................ 14 
`
`IV.  OVERVIEW OF CHALLENGE AND RELIEF REQUESTED .................. 15 
`
`A. 
`
`B. 
`
`Prior Art ............................................................................................... 15 
`
`Grounds for Challenge ........................................................................ 16 
`
`V. 
`
`BACKGROUND TECHNOLOGY ............................................................... 17 
`
`A.  Wireless Communications Signals ...................................................... 17 
`
`B. 
`
`“Modulating” Signals for Wireless Communications ......................... 18 
`
`1. 
`
`2. 
`
`3. 
`
`Amplitude Modulation .............................................................. 19 
`
`Phase Modulation ...................................................................... 20 
`
`Quadrature Amplitude Modulation (“QAM”) .......................... 21 
`
`VI.  OVERVIEW OF THE ’835 PATENT .......................................................... 24 
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`A.  Alleged Problem .................................................................................. 24 
`
`B. 
`
`C. 
`
`Alleged Invention ................................................................................ 24 
`
`The Examiner Did Not Consider or Analyze the Primary References
`Presented in This Petition During Original Prosecution ..................... 29 
`
`VII.  CLAIM CONSTRUCTION .......................................................................... 30 
`
`A. 
`
`B. 
`
`C. 
`
`“cable modem” (Claim 1, Preamble) .................................................. 30 
`
`“frequency translation module” (Claims 1, 18) .................................. 31 
`
`“storage module” (Claims 1, 18) ......................................................... 33 
`
`VIII.  OVERVIEW OF THE PRIOR ART REFERENCES ................................... 34 
`
`A.  Hulkko (Ex. 1004) ............................................................................... 34 
`
`B. 
`
`C. 
`
`Gibson (Ex. 1005) ............................................................................... 37 
`
`Schiltz (Ex. 1006) ................................................................................ 38 
`
`D.  DOCSIS References (Goldberg (Ex. 1007), Thacker (Ex. 1008)) ..... 40 
`
`E. 
`
`F. 
`
`ITU-T J.83b (Ex. 1009) ....................................................................... 41 
`
`AAPA .................................................................................................. 41 
`
`G.  Motivation to Combine ....................................................................... 42 
`
`1. 
`
`2. 
`
`3. 
`
`Ground 1: Hulkko in View of Gibson ...................................... 42 
`
`Ground 2: Gibson in View of Schiltz ....................................... 45 
`
`“Cable Modem” ........................................................................ 46 
`
`IX.  LEVEL OF ORDINARY SKILL IN THE ART ........................................... 49 
`
`X. 
`
`SPECIFIC GROUNDS FOR PETITION ...................................................... 49 
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`A.  Ground I: Claims 1, 12, 15, and 17 are Obvious Over Hulkko in View
`of Gibson ............................................................................................. 49 
`
`1. 
`
`Claim 1 ...................................................................................... 49 
`
`(a) 
`
`(b) 
`
`(c) 
`
`(d) 
`
`(e) 
`
`(f) 
`
`(g) 
`
`(h) 
`
`(i) 
`
`Element [1 preamble]: “A cable modem for down-
`converting an electromagnetic signal having complex
`modulations, comprising” ............................................... 49 
`
`Element [1A]: “an oscillator to generate an in-phase
`oscillating signal” ........................................................... 51 
`
`Element [1B]: “a phase shifter to receive said in-phase
`oscillating signal and to create a quadrature-phase
`oscillating signal” ........................................................... 51 
`
`Element [1C]: “a first frequency down-conversion
`module to receive the electromagnetic signal and said in-
`phase oscillating signal” ................................................. 54 
`
`Element [1D]: “a second frequency down-conversion
`module to receive the electromagnetic signal and said
`quadrature-phase oscillating signal” ............................... 55 
`
`Element [1E]: “wherein said first frequency down-
`conversion module further comprises a first frequency
`translation module” ........................................................ 56 
`
`Element [1F]: “and a first storage module” ................... 57 
`
`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” ........................ 58 
`
`Element [1H]: “said second frequency down-conversion
`module further comprises a second frequency translation
`module” ........................................................................... 60 
`
`(j) 
`
`Element [1I]: “and a second storage module” ................ 60 
`
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`(k) 
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`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” ............................................................................ 61 
`
`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.” ........... 62 
`
`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.” ......... 62 
`
`Claim 17: “The cable modem of claim 1, wherein the
`electromagnetic signal has been transmitted by a wireless
`method to the cable modem.” ................................................... 63 
`
`2. 
`
`3. 
`
`4. 
`
`B. 
`
`Ground II: Claims 1, 12-15, and 18-20 are Obvious Over Gibson in
`View of Schiltz .................................................................................... 64 
`
`1. 
`
`Claim 1 ...................................................................................... 64 
`
`(a) 
`
`(b) 
`
`(c) 
`
`(d) 
`
`Element [1 preamble]: “A cable modem for down-
`converting an electromagnetic signal having complex
`modulations, comprising” ............................................... 64 
`
`Element [1A]: “an oscillator to generate an in-phase
`oscillating signal” ........................................................... 65 
`
`Element [1B]: “a phase shifter to receive said in-phase
`oscillating signal and to create a quadrature-phase
`oscillating signal” ........................................................... 66 
`
`Element [1C]: “a first frequency down-conversion
`module to receive the electromagnetic signal and said in-
`phase oscillating signal” ................................................. 67 
`
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`(e) 
`
`(f) 
`
`(g) 
`
`(h) 
`
`(i) 
`
`(j) 
`
`(k) 
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`Element [1D]: “a second frequency down-conversion
`module to receive the electromagnetic signal and said
`quadrature-phase oscillating signal” ............................... 70 
`
`Element [1E]: “wherein said first frequency down-
`conversion module further comprises a first frequency
`translation module” ........................................................ 70 
`
`Element [1F]: “and a first storage module” ................... 71 
`
`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” ........................ 72 
`
`Element [1H]: “said second frequency down-conversion
`module further comprises a second frequency translation
`module” ........................................................................... 74 
`
`Element [1I]: “and a second storage module” ................ 74 
`
`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” ............................................................................ 74 
`
`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.” ........... 76 
`
`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.” ...................................................................................... 77 
`
`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.” ....... 78 
`
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`v
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`5. 
`
`6. 
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`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.” ......... 78 
`
`Claim 17: “The cable modem of claim 1, wherein the
`electromagnetic signal has been transmitted by a wireless
`method to the cable modem.” ................................................... 78 
`
`7. 
`
`Claim 18 .................................................................................... 79 
`
`(a) 
`
`(b) 
`
`(c) 
`
`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” ............. 79 
`
`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” .................... 79 
`
`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.” ............................................................................ 79 
`
`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.” ....................................................................... 80 
`
`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
`
`8. 
`
`9. 
`
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`control signal generator, and said third port of said second
`switch is coupled to said second storage device.” .................... 81 
`
`XI.  THE BOARD SHOULD INSTITUTE REVIEW AND JOIN THE
`PROCEEDING WITH IPR2021-00985 ........................................................ 81 
`
`XII.  PAYMENT OF FEES ................................................................................... 82 
`
`XIII.  CONCLUSION .............................................................................................. 82 
`
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`
`LIST OF EXHIBITS
`
`Description
`U.S. Patent No. 7,292,835 (“’835 patent”)
`Declaration of Dr. Matthew B. Shoemake Regarding U.S. Patent
`No. 7,292,835
`Excerpts of ’835 patent File History
`U.S. Patent No. 5,734,683 (“Hulkko”)
`U.S. Patent No. 4,672,117 (“Gibson”)
`U.S. Patent No. 5,339,459 (“Schiltz”)
`L. Goldberg, “MCNS/DOCSIS MAC Clears a Path for the Cable-
`Modem Invasion,” Electronic Design; Dec. 1, 1997; 45, 27;
`Materials Science & Engineering Collection pg. 69 (“Goldberg”).
`USPN 6,011,548 (“Thacker”)
`ITU-T J.83b Recommendation (April 1997) (“ITU-T J.83b”)
`Declaration of Brenda Ray
`Claim Construction Order, ParkerVision v. Intel, 20:cv-00108-ADA
`(W.D. Tex. January 26, 2021)
`May 7, 2021 email from WDTX clerk
`ParvkerVision’s Preliminary Infringement Contentions (TCL Case
`No. 6:20-cv-00945-ADA)
`ParvkerVision’s Preliminary Infringement Contentions (Hisense
`Case No. 6:20-cv-00870-ADA)
`ParvkerVision’s Preliminary Infringement Contentions (ZyXEL
`Case No. 6:20-cv-01010-ADA)
`Parties’ Proposed Agreed Scheduling Order in ParkerVision, Inc. v.
`LG Electronics, Inc., No. 6:51-cv-00520-ADA (W.D. Tex. Nov. 5,
`2021)
`
`Exhibit
`1001
`
`1002
`
`1003
`1004
`1005
`1006
`
`1007
`
`1008
`1009
`1010
`
`1011
`
`1012
`
`1013
`
`1014
`
`1015
`
`1016
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`
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`viii
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`

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`IPR2022-00246
`U.S. Patent No. 7,292,835
`
`Exhibit
`
`1099
`
`
`Description
`Declaration of Dr. Dean P. Neikirk Regarding U.S. Patent No.
`7,292,835 (“Decl.”)1
`
`
`
`
`1 As explained in the accompanying Motion for Joinder, Dr. Dean P. Neikirk’s
`
`declaration in support of this Petition (Ex.1099-Decl.) is substantially identical to
`
`the declaration of Dr. Matthew B. Shoemake (Ex.1002), submitted in IPR2021-
`
`00985. The corresponding declarations are cited in tandem herein, i.e.,
`
`Ex.1002/1099-Decl.
`
`
`
`ix
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`

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`IPR2022-00246
`U.S. Patent No. 7,292,835
`LG Electronics Inc. (“Petitioner”) respectfully requests 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).
`
`A Motion for Joinder is filed herewith requesting joinder with TCL Industries
`
`Holdings Co. v. ParkerVision, Inc., IPR2021-00985 (“the TCL IPR”). The TCL IPR
`
`was filed by TCL Industries Holdings Co., Ltd. (“TCL”), Hisense Co., Ltd.
`
`(“Hisense”), and ZyXEL Communications Corp. (“ZyXEL”)2 (collectively “the
`
`TCL Petitioners”) on May 20, 2021, and inter partes review of claims 1, 12-15, and
`
`17-20 was instituted on November 19, 2021. See IPR2021-00985, Paper 14. The
`
`instant Petition is substantively identical to the petition filed by the TCL Petitioners,
`
`challenging the same claims of the ’835 patent on the same grounds and relying on
`
`substantively identical expert testimony, consistent with PTAB joinder practice.
`
`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
`
`
`2 On October 7, 2021, the Board terminated ZyXEL as a Petitioner in the TCL IPR.
`
`See Paper 13 in IPR2021-00985.
`
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`1
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`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 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)3 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):4
`
`
`3 All annotations and emphasis have been added unless otherwise noted.
`
`4 The amplifiers and filters shown in Figure 54B are “optional” structures. (Ex.
`
`1001 at 43:35-42.)
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`2
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`IPR2022-00246
`U.S. Patent No. 7,292,835
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`FIG. 54B
`Ex. 1001-’835, Fig. 54B
`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
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`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:
`
`
`
`Ex. 1000-’835 patent Fig. 20A
`
`
`
`Ex. 1000-’835 patent Fig. 20A-1
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`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.
`
`1002/1099-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
`
`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:5
`
`
`5 Hulkko discloses that control signals PHI3 and PHI4 are 90 degrees out of phase
`
`with each other. (Ex. 1004 at 4:5-9.).
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`IPR2022-00246
`U.S. Patent No. 7,292,835
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`Ex. 1004-Hulkko, Fig. 2.
`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.
`
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`6
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`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-
`
`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”):
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`IPR2022-00246
`U.S. Patent No. 7,292,835
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`Ex. 1005-Gibson, Fig. 1
`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 (“n/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. 1002/1099-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).
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`IPR2022-00246
`U.S. Patent No. 7,292,835
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`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.”), 6:310 (“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.).
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`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
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`oscillating signal (pink) for the sample and hold circuit 26, and couples to a gate of
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`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.
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`(Id. at 7:58-8:48). A drain of field effect transistor 76 serves as the output of the
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`sample and hold switch 68, which outputs a sampled signal (yellow). (Id.).
`
`
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`10
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`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. 1002/1099-
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`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 comprising
`
`switched capacitors). The preamble of claim 1 of the ’835 patent recites that the
`
`modem is a “cable modem,” and the specification teaches that cable modems can be
`
`wired or wireless. (Ex. 1001 at 36:50-56; id. at 37:24-30.). To the extent it is argued
`
`or determined that the preamble is not merely a statement of intended use of the
`
`structure recited in the body of the challenged claims, using the prior art modems
`
`discussed above as “cable modems” would have been obvious.
`
`The ’835 patent admits that cable modems were “well known devices.” (Ex.
`
`1001 at 40:17-35.). Indeed, there existed a number of industry standards for cable
`
`data transmission that pre-date the ’835 patent, including the “DOCSIS” (Data Over
`
`Cable Service Interface Specification) cable modem standard mentioned in the ’835
`
`specification (Ex. 1001 at 40:8-16), Version 1.0 of which was first released on March
`
`26, 1997, and the ITU-T J.83.b standard released in April 1997. (Ex. 1007; Ex. 1009;
`
`
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`Ex. 1008 at 1:30-40.). Version 1.0 of DOCSIS and the J.83 Recommendation each
`
`specify use of a QAM demodulation technique (Ex. 1007 at 5; Ex. 1009 at 1, Table
`
`1), and for the reasons discussed above and below, the receivers of Hulkko and
`
`Gibson can each be used to demodulate QAM-modulated signals such as would be
`
`received at the customer side of a cable modem. Given that cable modems were
`
`admittedly “well known,” and utilize standard QAM demodulation (see Section
`
`VIII.D, VIII.E, infra), it would have been obvious to use the receivers of Hulkko
`
`(modified by Gibson) or Gibson (modified by Schiltz) as the operative receiving
`
`elements of a “cable modem.” Accordingly, the challenged claims are obvious even
`
`if the Board finds that the preamble of claim 1 is limiting. (Ex. 1002/1099-
`
`Decl.¶¶85-88.).
`
`* * *
`
`For all of the above reasons, Petitioner respectfully requests that the Board
`
`institute inter partes review and cancel claims 1, 12-15, and 17-20 of the ’835 patent.
`
`Since the ’835 patent currently is asserted in litigation, in view of § 314(a), Petitioner
`
`requests an expedited Notice of Filing Date Accorded.
`
`II. MANDATORY NOTICES (§42.8)
`A. Real Party-in-Interest
`Petitioner and LG Electronics U.S.A., Inc. are real parties-in-interest.
`
`B. Related Matters
`Petitioner is aware of the following civil actions involving the ’835 patent:
`
`
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`12
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`IPR2022-00246
`U.S. Patent No. 7,292,835
` ParkerVision, Inc. v. TCL Technology Group Corp., Case 5:20-cv-
`
`01030 (CDCA);
`
` ParkerVision, Inc. v. Hisense Co., Case 6:20-cv-00870 (WDTX)
`
`(“Hisense Litigation”);
`
` ParkerVision, Inc. v. TCL Industries Holdings Co., Case 6:20-cv-00945
`
`(WDTX) (“TCL Litigation”);
`
` ParkerVision, Inc. v. ZyXEL Communications Corporation, Case 6:20-
`
`cv-01010 (WDTX);
`
` ParkerVision, Inc. v. Buffalo Inc., Case 6:20-cv-01009 (WDTX).
`
` TCL Industries Holdings Co. v. ParkerVision, Inc., IPR2021-00985
`
`(PTAB) (“TCL IPR”);
`
` ParkerVision, Inc. v. LG Electronics, Inc., Case 6:21-cv-00520
`
`(WDTX); and
`
` Additionally, Petitioner plans to file a Petition for inter partes review
`
`of certain claims of USP 7,110,444 (“the ’444 patent”). See LG
`
`Electronics Inc. v. ParkerVision, Inc., IPR2022-00245 (PTAB). Patent
`
`Owner alleges that it owns both the ’444 and ’835 patents and is
`
`asserting both against Petitioner in the underlying litigation.
`
`
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`
`Petitioner Back-up Counsel:
`
`C. Counsel and Service Information
`Petitioner Lead Counsel:
`Scott A. McKeown
`Reg. No. 42,866
`scott.mckeown@ropesgray.com
`Steven Pepe
`Reg. No. 42,069
`steven.pepe@ropesgray.com
`Scott Taylor
`Reg. No. 62,353
`scott.taylor@ropesgray.com
`
`Matthew R. Shapiro
`Reg. No. 70,945
`matthew.shapiro@ropesgray.com
`LG-ParkerVision-
`PTABService@ropesgray.com
`ROPES & GRAY LLP
`IPRM—Floor 43
`Prudential Tower
`800 Boylston Street
`Boston, MA 02199-3600
`
`Email:
`
`Post and hand delivery:
`
`
`
`Petitioner consents to electronic service of documents to the email addresses
`
`of the counsel identified above.
`
`III. CERTIFICATION OF GROUNDS FOR STANDING
`Petitioner certifies pursuant to Rule 42.104(a) that the patent for which review
`
`is sought is available for inter partes review and that Petitioner is not barred or
`
`estopped from requesting an inter partes review challenging the claims.
`
`
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`IV. OVERVIEW OF CHALLENGE AND RELIEF REQUESTED
`Pursuant to Rules 42.22(a)(1) and 42.104(b)(1)-(2), Petitioner challenges
`
`claims 1, 12, 13, 14, 15, 17, 18, 19, 20 of the ’835 patent.
`
`A.
`Prior Art
`Petitioner relies upon the patents and printed publications in the Table of
`
`Exhibits, including:
`
`1.
`
`USP 5,734,683 (“Hulkko”) (Ex. 1004), issued on March 31, 1998, and
`
`is prior art under 35 U.S.C. § 102(b)6;
`
`2.
`
`USP 4,682,117 (“Gibson”) (Ex. 1005), issued on July 21, 1987, and is
`
`prior art under 35 U.S.C. § 102(b);
`
`3.
`
`USP 5,339,459 (“Schiltz”) (Ex. 1006), issued on August 16, 1994, and
`
`is prior art under 35 U.S.C. § 102(b);
`
`4.
`
`L. Goldberg, “MCNS/DOCSIS MAC Clears a Path for the Cable-
`
`Modem Invasion,” Electronic Design; Dec. 1, 1997; 45, 27; Materials
`
`Science & Engineering Collection pg. 69 (“Goldberg”) (Ex. 1007),
`
`published on December 1, 1997 (see Ex. 1010, Declaration of Brenda
`
`Ray) and is prior art under 35 U.S.C. § 102(b);
`
`
`6 Because the ’835 patent’s filing date precedes the AIA’s effective date, Petitioner
`
`has used the pre-AIA statutory framework to refer to the prior art.
`
`
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`15
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`IPR2022-00246
`U.S. Patent No. 7,292,835
`USP 6,011,548 (“Thacker”) (Ex. 1008), was filed on September 4,
`
`5.
`
`1998, and issued January 4, 2000, and is prior art under 35 U.S.C.
`
`§§102(a) and 102(e);
`
`6.
`
`ITU-T J.83b Recommendation (April 1997) (“ITU-T J.83b”) (Ex.
`
`1009), was published in April 1997 and is prior art under 35 U.S.C.
`
`§102(b); and
`
`7.
`
`Applicant admitted prior art (“AAPA”), set forth in the ’835 patent (Ex.
`
`1001) at Column 40, lines 17-35.
`
`B. Grounds for Challenge
`Ground 1: Claims 1, 12, 15, and 17 of the ’835 patent are unpatentable as
`
`obvious under 35 U.S.C. §103 over Hulkko in view of Gibson.
`
`Ground 2: Claims 1, 12-15, and 17-20 of the ’835 patent are unpatentable as
`
`obvious under 35 U.S.C. §103 over Gibson