Unlted States Patent [19]
`Darnell et al.
`
`[11] Patent Number:
`[45] Date of Patent:
`
`5,043,736
`Aug. 27, 1991
`
`[54] CELLULAR POSITION LOCATING SYSTEM
`[75] Inventors: Ralph D. Darnell, Friendswood;
`Claude C. Douglas, Houston, both of
`Tex.
`[73] Assignee: CAE-Link Corporation, Binghamton,
`NY
`[21] Appl No: 553,651
`[22] Filed:
`Jul‘ 27’ 1990
`
`-------------------------------------- -- “041334;;
`
`4,953,198 8/1990 Daly et al. .......................... .. 379/61
`Primary Examiner-Mark Hellner
`Attorney, Agent, or Firm-Malin, Haley, McHale,
`Dimaggio & Crosby
`[57]
`ABSTRACT
`The invention comprises a portable locating unit useful
`both as a cellular telephone and portable global posi
`tioning system that provides latitude and longitude
`information remotely to a base unit display. The system
`includes a small hand held receiver that receives signals
`
`
`
`
`
`I .- [58] Flew of Search """"""" " 342/357’ 450’ a - . - . . . ~ - ' - s t - - - - - s - . a . - - - - - . . . - . - . - . . - . - . . . . . . . a t - a:
`
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`
`a computing circuits to provide location information sig
`
`nals. The hand held unit also includes a modem and
`transmitter to a cellular telephone network which is
`connected to the base unit computational system and
`display. The location of an individual or object can thus
`be determined at the remote station through the use of
`the cellular telephone network.
`
`[56]
`
`References Cited
`Us PATENT DOCUMENTS
`
`gizllozteglal' """"""""""
`' """ "
`'
`’
`4,809,005 2/1989 Counselman, III ..
`4,907,290 3/1990 Crompton ........... ..
`
`342/357 X
`342/457 X
`
`4,912,756 3/1990 Hop . . . . . . . . . . . . . .
`
`. i . . . . . .. 379/60
`
`4 Claims, 4 Drawing Sheets
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`
`Unified Patents
`Exhibit 1015
`Page 1 of 16
`
`

`

`US. Patent
`
`Aug. 27, 199i
`
`sheet 1 of 4
`
`5,043,736
`
`18
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`Unified Patents
`Exhibit 1015
`Page 2 of 16
`
`

`

`US. Patent
`
`Aug. 27, 199i
`
`Sheet 2 of 4 ‘
`
`5,043,736
`
`% SATELLH'E
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`
`Unified Patents
`Exhibit 1015
`Page 3 of 16
`
`

`

`US. Patent
`
`Aug. 27, 199i
`
`Sheet 3 of 4
`
`5,043,736
`
`12
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`GPS RECEIVER
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`Unified Patents
`Exhibit 1015
`Page 4 of 16
`
`

`

`US. Patent
`
`Aug. 27, 1991
`
`Sheet 4 of 4
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`5,043,736
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`Unified Patents
`
`Exhibit 1015 '
`
`Page 5 of 16
`
`Unified Patents
`Exhibit 1015
`Page 5 of 16
`
`
`
`
`
`
`

`

`1
`
`CELLULAR POSITION LOCATING SYSTEM
`
`BACKGROUND OF THE INVENTION
`1. Field of the Invention
`This invention relates to a system for ascertaining the
`latitude and longitude of an individual or object at a
`remote location and transmitting information to a base
`operation using a man-pack or singular portable person
`nel unit that embodies a cellular telephone network in
`conjunction with a satellite navigation system, and spe
`ci?cally to a hand-held locating unit that can serve both
`as a cellular telephone and a portable globular position
`ing system to provide latitude and longitude informa
`tion for display at a base unit.
`'
`2. Description of the Prior Art
`The prior art shows a plethora of systems for locating
`individual vehicles relative to a central station. Raoux
`US. Pat. No. 4,701,760, issued on Oct. 20, 1987 shows
`a vehicle monitoring system that uses World Omega
`Network and a vehicle carried receiver to provide ap
`proximate coordinates to a central location. DiLulo et
`al, US. Pat. No. 4,897,642, issued Jan. 30, 1990, shows
`a method for monitoring the status of a multiple part
`vehicle (such as an eighteen wheel truck) and its cargo
`carrier through the use of satellites and an earth station.
`Knickel US. Pat. No. 3,568,161, issued Mar. 2, 1971
`shows a vehicle locator system which employs a plural
`ity of sensor stations and a central station. Green et al,
`US. Pat. No. 4,791,572 issued Dec. 13, 1988, shows a
`locating system that uses the LORAN-C system for
`positioning information. Gray US. Pat. No. 4,891,761,
`issued Jan. 2, 1990, shows a system for updating a digi
`tized map comparing known and unknown intersections
`in conjunction with a navigational tracking unit.
`The units described in the prior art are complex in
`operation and do not utilize available cellular telephone
`technology. The present invention overcomes problems
`of the prior art by providing a non-complex portable
`hand-held unit that has cross country capability and
`versatility for use as a regular cellular telephone in
`conjunction with a precise navigational locating system
`that can be conveniently and easily carried for transmis
`sion and display of position information at a base loca
`tion.
`
`15
`
`25
`
`30
`
`35
`
`5,043,736
`2
`code train that matches the satellite code exactly. The
`Pseudo Random Code is generated at the same time as
`the satellite codes are received. The received train of
`pulses from the satellite is then matched with the
`Pseudo Random Code to provide a time difference
`between satellite time and the Pseudo Random Code
`generated time which provides for satellite range. The
`information is then stored in memory and provided to a
`cellular telephone modem and transmitter for ‘transmis
`sion through the cellular telephone system.
`The base unit, which receives and coordinates the
`locations of various personnel at the remote locations,
`includes a computation system for decoding the posi
`tion data transmitted from the remote units through the
`cellular telephone system. The base unit uses a com
`puter that includes a visual display device showing a
`map upon which the decoded position data will be used
`to show coordinates in latitude and longitude of each
`remote unit.
`The remote unit in one con?guration may be a small
`hand-held unit using battery power that includes a GPS
`helix antenna for receiving satellite signals and a cellular
`antenna for transmission of the coded position informa
`tion to the cellular telephone system. The remote unit
`could also be con?gured to use electrical power from a
`vehicle.
`When using ‘the present invention it should be noted
`that the invention combines an existing global naviga
`tional positioning system through the use of satellites,
`cellular telephone technology, computer and modem
`interfaces. Thus the hand carried unit is self contained.
`The remote unit includes a special modem system
`which could use, in one example, Bell 202A Protocol
`without the use of a dial tone, in order to transfer posi
`tion data from computer memory to the cellular phone
`system. The hand held unit also includes frequency shift
`circuitry built within and in one embodiment may use a
`BAUD rate of 1200 bits per second.
`It is an object of this invention to provide a hand held
`- “man pack unit” for use by an individual or object to
`provide geographical positioning information such as
`latitude and longitude from a remote site to a base unit
`using cellular telephone methodology.
`It is another object of this invention to provide a
`relatively small portable hand held unit that can provide
`geographical positioning information throughout the
`globe to a base unit having a display of the geographical
`location on a map.
`It is another object of this invention to provide a low
`cost, readily available global positioning system for use
`by individuals or objects at remote locations to provide
`geographical positioning information of the individuals
`or objects to a base station using existing satellite and
`cellular telephone technologies.
`In accordance with these and other objects which
`will be apparent hereinafter, the instant invention will '
`now be described with particular reference to the ac
`companying drawings.
`BRIEF DESCRIPTION OF THE DRAWINGS
`FIG. 1 shows a basic schematic diagram of the system
`according to the invention.
`FIG. 2 shows an additional schematic diagram of the
`basic intervention.
`FIG. 3 shows a schematic circuit diagram of the
`remote unit used in the present invention.
`
`45
`
`BRIEF SUMMARY OF THE INVENTION
`A global positioning system especially adapted for
`use by an individual or object that includes a portable
`remote unit and a base information display unit. The
`portable remote unit includes an RF receiver circuit for
`use with a satellite navigation system, a microprocessor
`for analyzing coded signals, cellular phone modem
`circuits for transmitting encoded signals to the base unit
`and a time of day clock. The base unit includes a com
`putational system for decoding position data and a vi
`sual display device for presenting the remote unit map
`coordinates.
`The portable remote unit is comprised of four sub
`systems which include the global positioning system RF
`“L” band antenna and receiver that receives signals
`from a plurality of existing satellites. A microprocessor
`is used as the computational system that receives the
`output from a signal demodulator in the GPS receiver.
`The central timing circuit for accurate time of day has
`outputs connected to the GPS demodulator and the
`microprocessor. The GPS receiver generates its own
`ephemeris data called “Pseudo Random Code” and a
`
`50
`
`55
`
`65
`
`Unified Patents
`Exhibit 1015
`Page 6 of 16
`
`

`

`5,043,736
`3
`FIG. 4 shows a block diagram showing the basic
`circuitry of the remote unit.
`FIG. 5 shows one possible con?guration of a remote
`unit in a perspective view.
`
`4
`decode the signal and translate it into information in a
`suitable display 20 which will show the geographical
`coordinates of latitude and longitude on a map on the
`display.
`Referring now to FIG. 5, a possible con?guration of
`the remote unit is shown which includes the helix an
`tenna 12 for receiving the global positioning system
`signals and the cellular antenna 14, all of which is
`mounted in a small rectangular housing 52 which could
`be dimensionally sized to be hand held. The remote unit
`could also be con?gured in a vehicle to use vehicle
`power, and as such, if used for surveillance or military
`use, the antennas could be hidden.
`The invention as described provides for a portable
`hand carried or vehicle remote unit that allows individ
`uals or objects to be located from a base station any
`where in the world using a non-complex, relatively
`inexpensive system that employs current cellular phone
`technology.
`The instant invention has been shown and described
`herein in what it is considered to be the most practical
`and preferred embodiment. It is recognized, however,
`that departures may be made therefrom within the
`scope of the invention and that obvious modi?cations
`will occur to a person skilled in the art.
`What I claim is:
`1. A cellular position locating system for locating the
`geographical coordinates of a person at a remote loca
`tion using a portable hand held remote unit and a cellu
`lar telephone system comprising:
`receiver means for receiving navigational signals
`from satellites in orbit about the earth;
`signal processing means for demodulating the satellite
`navigationals signals;
`means for generating a pseudo random code;
`timing means connected to said signal processing
`means demodulating means and said signal process
`ing means;
`means for generating position information signals by
`comparing the time difference of the navigational
`signals and the pseudo random code signals;
`means for converting said position information sig
`nals into cellular telephone signals;
`cellular telephone signal transmitting means;
`cellular telephone system for receiving and transmit
`ting said transmitted cellular telephone signals;
`base unit means coupled to said cellular telephone
`system for processing cellular telephone signals
`received from said cellular transmitter;
`said base unit means including means for decoding
`the received signal for determining geographic
`location position data; and
`a display means connected to said base unit for dis
`playing the geographical coordinate information.
`2. A method for locating a person or object at a re
`mote location from a base location comprising the steps
`of:
`(a) receiving navigational information signals from a
`satellite location at a remote location;
`(b) generating a pseudo random code at the remote
`location and comparing it to a known time signal
`relative to the satellite navigational signals;
`(0) providing cellular telephone modern signal pro
`cessing means for transforming the navigational
`information into a cellular telephone signal;
`(d) transmitting the cellular telephone signal contain
`ing the navigational signal information to a cellular
`telephone network;
`
`25
`
`PREFERRED EMBODIMENT OF THE
`INVENTION
`Referring now to FIG. 1, the invention is shown
`which uses signals from satellites SV1, SV2 and SV3
`which are transmitted to the remote unit 10 having a
`?rst antenna 12 for receiving the signals from the satel
`lites and second antenna 14 for transmitting the appro
`priate signals to a cellular telephone system 16. The
`cellular telephone system then provides the proper sig
`nals to the base unit whereupon the information is trans
`formed into a display. FIG. 2 shows the base unit which
`includes a computer 18 connected to a visual display 20
`which will provide the appropriate latitude and longi
`tude location of the remote unit 10 on the display map.
`Overall, the invention is comprised of the remote unit
`20
`10, a cellular phone system 16 and the base unit 18. The
`remote unit 10 includes an RF “L” band receiver for the
`global positioning system, a computational system com
`prised of a microprocessor, a cellular telephone and a
`special telephone modern system. The base unit 18 is
`comprised of a computational system 18 for decoding
`position data received from remote units and includes a
`visual display 20 which presents the remote unit map
`coordinates on a map display.
`Referring now to FIG. 3, a remote unit 10 is shown
`comprised of the helix L band antenna 12 connected to
`the global positioning system receiver circuits 22 hav
`ing an output to microprocessor circuits 24. The output
`of the microprocessor circuits 24 is connected to
`modern circuits 26 and to the cellular telephone circuits
`28 whose output goes to antenna 14 for transmission to
`a cellular telephone receiver.
`Referring now to FIG. 4, a more detailed diagram of
`the remote unit is shown. Antenna 12 receives an L
`band signal from the global positioning system and
`40
`satellite network and receiver 30 which is sent to a
`demodulator 32 and to the microprocessor 34 for
`GDOP (Geometric Dillusion of Precision) calculations.
`The microprocessor 34 also receives correct time of day
`signals from central timing 42. The microprocessor 34
`45
`generates pseudo random code based on exactly the
`same time as the satellite signal. The pseudo random
`code train then matches the satellite code exactly. The
`received train pulses from the satellites are then
`matched with the pseudo code train. The difference in
`time between the satellite time and pseudo code gener
`ated time gives the satellite ranges based on distance:
`velocityXtime. The information is then stored in the
`random access memory (RAM) 36 which itself is con
`nected to the memory controller 40.
`'
`55
`Once the signal is processed and stored in the RAM
`36, the information can be transferred through memory
`controller to the phone modem 44 from which it is sent
`to the cellular transmitter 46 for sending the informa
`tion through antenna 14.
`The remote unit also includes a cellular telephone
`receiver 48 for receiving data including a decoder 50
`which connects back to the memory control and central
`timing to permit control from the base unit via the cellu
`lar telephone system. Referring back to FIG. 2, once
`the signal is sent from the remote unit through the cellu
`' lar phone system 16, and it is received at a CPU at the
`base unit, the computer 18 at the base unit will then
`
`65
`
`Unified Patents
`Exhibit 1015
`Page 7 of 16
`
`

`

`5,043,736
`6
`5
`(e) receiving the cellular telephone signal containing
`telephone modem means connected to the output of
`said satellite signal processing means for convert
`the navigational signal information through a cellu
`ing said geographical location output signal into a
`lar telephone to a central processing unit;
`cellular telephone signal;
`(t) displaying the navigational signal information
`cellular telephone signal transmitter connected to
`received at a base unit.
`said modem and mounted in said housing;
`3. A cellular position locating system to provide lati
`cellular telephone signal network for receiving and
`tude and longitude information from a remote site to a
`transmitting cellular telephone signals; and
`base site comprising:
`a base unit connected to said cellular telephone signal
`a portable housing sized to be hand held;
`network for receiving said cellular telephone sig
`portable navigational satellite signal receiving means
`nals representing said geographical location and
`mounted in said housing;
`for providing a display that represents said geo
`graphical location of said navigational satellite
`means for generating a pseudo random code mounted
`signal receiving means.
`in said housing;
`4. A cellular position locating system as in claim 3,
`timing means to provide time of day mounted in said
`including:
`housing;
`a cellular telephone signal receiver mounted in said
`satellite signal and pseudo random code processing
`housing to receive command signals from said base
`means having inputs connected to said navigational
`unit; and
`satellite signal receiving means, pseudo random
`memory means mounted in said housing and con
`code generating means and said timing means to
`nected to said cellular telephone signal receiver
`provide an output signal representing the geo
`and said signal processing'means to provide control
`graphical location of said satellite signal receiving
`to said satellite signal processing means.
`‘ i
`i i
`*
`means;
`
`15
`
`25
`
`35
`
`45
`
`55
`
`65
`
`Unified Patents
`Exhibit 1015
`Page 8 of 16
`
`

`

`USOO5043736A
`REEXAMINATION CERTIFICATE (2380th)
`[11] BI 5,043,736
`United States Patent [191
`[45] Certi?cate Issued
`Sep. 6, 1994
`Darnell et al.
`
`[54] CELLULAR POSITION LOCATION SYSTEM
`
`[75] Inventors: Ralph D. Darnell, Friendswood;
`Claude C. Douglas, Houston, both of
`Tex.
`CAE-Link Corporation, Binghamton,
`NY.
`
`[73] Assignee:
`
`Reexamination Request:
`No. 90/002,943, Jan. 28, 1993
`
`Reexamination Certi?cate for:
`Patent No.:
`5,043,736
`Issued:
`Aug. 27, 1991
`Appl. No.:
`558,651
`Filed:
`Jul. 27, 1990
`5
`[51] Int. Cl. ........................................... .. H0413 7/ 185
`[52] U_.S. Cl. .................................................. .. 342/357
`[58] Field of Search ............. .. 342/357, 450, 451, 454,
`342/457
`
`[561
`
`References Cited
`
`US PATENT DOCUMENTS
`4,750,197 @1933 Denekamp et aL _
`4,754,465 6/1988 Trimble .
`5,014,206 5/1991 Scribner et al. .
`
`FOREIGN PATENT DOCUMENTS
`WO8912835 12/1989 PCT lnt’l Appl.
`GOlS 5/02
`
`OTHER PUBLICATIONS
`“GPS-Based Vessel Position Monitoring and Display
`System”, IEEE 1990 Position Location and Navigation
`Symposium, Mar. 20, 1990.
`Trimble Data Sheet dated May l989 disclosing hand
`held GPS Receiver Sold by Trimble Navigation under
`the name “TRIMPACK”.
`Primary Examiner-—Mark Hellner
`
`ABSTRACT
`[57]
`The invention comprises a portable locating unit useful
`both as a cellular telephone and portable global posi
`tioning system that provides latitude and longitude
`information remotely to a base unit display‘ The System
`includes a Small hand held receiver that receives signals
`from a satellite global positioning system and timing and
`computing circuits to provide location information sig
`nals. The hand held unit also includes a modern and
`transmitter to a cellular telephone network which is
`connected to the base unit computational system and
`display. The location of an individual or object can thus
`be determined at the remote station through the use of
`the cellular telephone network.
`
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`Unified Patents
`Exhibit 1015
`Page 9 of 16
`
`

`

`1
`
`REEXAMINATION CERTIFICATE
`ISSUED UNDER 35 U.S.C. 307
`
`THE PATENT IS HEREBY AMENDED AS
`INDICATED BELOW.
`
`30
`
`15.! 5,043,736
`2
`navigational information into a cellular telephone
`signal;
`[(d)] (e) transmitting the cellular telephone signal
`containing the navigational signal information to a
`cellular telephone network;
`[(c)] (f) receiving the cellular telephone signal con
`taining the navigational signal information through
`a cellular telephone to a central processing unit;
`and
`l [(1)] (g) displaying the navigational signal informa
`tion received at a base unit.
`3. A cellular position locating system to provide lati
`tude and longitude information from a remote site to a
`base site comprising:
`a portable housing sized to be hand held;
`portable navigational satellite signal receiving means
`mounted in said housing;
`means for generating a pseudo random code mounted
`in said housing;
`timing means to provide time of day mounted in said
`housing;
`satellite signal and pseudo random code processing
`means having inputs connected to said navigational
`satellite signal receiving means, psuedo random
`code generating means and said timing means to
`provide an output signal representing the geo
`graphical location of said satellite signal receiving
`means;
`means for temporarily storing said output signal;
`telephone modem means connected to [the output of
`said satellite signal processing means] said means
`for temporarily storing for converting said geo
`graphical location output signal into a cellular tele
`phone signal;
`cellular telephone signal transmitter connected to
`said modem and mounted in said housing;
`cellular telephone signal network for receiving and
`transmitting cellular telephone signals; and
`a base unit connected to said cellular tlephone signal
`network for receiving said cellular telephone sig
`nals, representing said geographical location and
`for providing a display that represents said geo
`graphical location of said navigational satellite
`signal receiving means.
`5. A cellular position locating system for locating the
`geographical coordinates of a person at a remote location,
`comprising:
`a portable hand held remote unit, said remote unit com
`prising:
`receiver means for receiving navigational _ signals from
`satellites in orbit about the earth;
`signal processing means for demodulating the satellite
`navigational signals;
`means for generating a pseudo random code;
`timing means connected to said signal processing means
`and said means for generating;
`means for generating position information signals by
`comparing the time di?'erence of the navigational
`signals and the pseudo random code signals;
`means for temporarily storing said position information
`signals,‘
`_
`means for converting said position information signals
`into cellular telephone signals; and
`cellular telephone signal transmitting means and receiv
`ing means, said cellular position locating system ?ir
`ther comprising:
`
`Matter enclosed in heavy brackets [] appeared in the
`patent, but has been deleted and is no longer a part of the
`patent; matter printed in italics indicates additions made
`to the patent.
`
`10
`
`AS A RESULT OF REEXAMINATION, IT HAS
`BEEN DETERMINED THAT:
`
`Claims 1,2 and 3 are determined to be patentable as
`amended.
`
`Claim 4, dependent on an amended claim, is deter
`mined to be patentable.
`
`20
`
`New claims 5 and 6 are added and determined to be
`patentable.
`
`1. A cellular position locating system for locating the
`geographical coordinates of a person at a remote loca
`tion [using a portable hand held remote unit and a
`cellular telephone system] comprising:
`a portable hand held remote unit, said remote unit com
`prising:
`receiver means for receiving navigational signals
`from satellites in orbit about the earth;
`signal processing means for demodulating the satellite
`navigational signals;
`means for generating a pseudo random code;
`timing means connected to said signal processing
`means demodulating means and said signal process
`ing means;
`means for generating position information signals by
`comparing the time difference of the navigational
`signals and the pseudo random code signals;
`means for converting said position information sig
`nals into cellular telephone signals;
`means for temporarily storing said position information
`signals; and
`cellular telephone signals transmitting means, said
`cellular position locating system further comprising;
`cellular telephone system for receiving and transmit
`ting said transmitted cellular telephone signals;
`base unit means coupled to said cellular telephone
`system of processing cellular telephone signals
`received from said cellular transmitter;
`said base unit means including means for decoding
`the received signal for determining geographic
`location position data; and
`a display means connected to said base unit for dis
`playing the geographical coordinate information.
`2. A method for locating a person or object at a re
`mote location from a base location comprising the steps
`of:
`(a) receiving navigational information signals from a
`satellite location at a remote location;
`(b) generating a pseudo random code at the remote
`location and comparing it to a known time signal
`relative to the satellite navigational signals;
`(c) temporarily storing said satellite navigational signals;
`[(c)] (d) providing cellular telephone modem signal
`processing means for continuously transforming the
`
`25
`
`35
`
`45
`
`50
`
`55
`
`65
`
`Unified Patents
`Exhibit 1015
`Page 10 of 16
`
`

`

`Bl 5,043,736
`
`3
`a cellular telephone system for receiving and transmit
`ting a cellular telephone signal from said transmitting
`means;
`base unit means coupled to said cellular telephone sys
`tem for processing cellular telephone signals received
`from said cellular transmitter;
`said base unit means including a means ?vr decoding the
`received signal for determining geographic location
`position data; and
`display means connected to said base unit for displaying
`the geographic location data.
`6. A method for locating a person or object at a remote
`location ?om a base location, comprising the steps of
`(a) receiving navigational in?vrmation signals from a
`satellite location at a remote location;
`
`5
`
`10
`
`15
`
`4
`(b) generating a pseudo random code at said remote
`location and comparing said code to a known time
`signal relative to said navigational information signals
`and producing a position signal therefrom;
`(c) temporarily storing said position signal;
`(d) providing cellular telephone modem signal process
`ing means for continuously transforming said position
`signals into a cellular signal;
`(e) transmitting said cellular telephone signal containing
`said position signal to a cellular telephone network;
`(1‘) receiving the cellular telephone signal containing said
`position signal through a cellular telephone attached
`to a central processing unit; and
`(g) displaying the navigational signal information re
`ceived at a base unit.
`‘I
`i it
`
`‘I
`
`8
`
`25
`
`30
`
`35
`
`45
`
`65
`
`Unified Patents
`Exhibit 1015
`Page 11 of 16
`
`

`

`US005043736C2
`(12) EX PARTE REEXAMINATION CERTIFICATE (7193rd)
`United States Patent
`US 5,043,736 C2
`(10) Number:
`Nov. 24, 2009
`(45) Certi?cate Issued:
`Darnell et al.
`
`(54) CELLULAR POSITION LOCATION SYSTEM
`
`(75) Inventors: Ralph D. Darnell, Friendswood, TX
`(US); Claude C. Douglas, Houston, TX
`(Us)
`(73) Assignee: B.I. Incorporated
`
`Reexamination Request:
`No. 90/007,576, Jun. 6, 2005
`No. 90/008,655, May 18, 2007
`
`Reexamination Certi?cate for:
`Patent No.:
`5,043,736
`Issued:
`Aug. 27, 1991
`Appl. No.:
`07/558,651
`Filed:
`Jul. 27, 1990
`
`7/1984 Takeuchi
`4,459,667 A
`4,547,778 A 10/1985 Hinkle et al.
`4,596,988 A
`6/1986 Wanka
`4,651,156 A
`3/1987 Martinez
`4,651,157 A
`3/1987 Gray et al.
`4,680,590 A
`7/1987 Lowe et a1.
`4,689,626 A * 8/1987 Horietal. ............ .. 324/357.12
`
`(Continued)
`FOREIGN PATENT DOCUMENTS
`
`EP
`EP
`EP
`FR
`FR
`W0
`WO
`W0
`
`10/1984
`123562
`10/1986
`199266
`10/1987
`0242099
`8/1984
`2-541-801
`7/1986
`2568834
`WO 89/12835 A1 * 12/1989
`WO89/12835
`12/1989
`WO 90/08371 A1 * 7/1990
`
`Reexamination Certi?cate B1 5,043,736 issued Sep. 6, 1994
`
`OTHER PUBLICATIONS
`
`(51) Int. Cl.
`H04B 7/185
`
`(2006.01)
`
`(52) U.S. Cl. .................................................. .. 342/357.1
`(58) Field of Classi?cation Search .............. .. 342/357.1
`See application ?le for complete search history.
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
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`
`(Continued)
`Primary Examinerilimmy G Foster
`
`(57)
`
`ABSTRACT
`
`The invention comprises a portable locating unit useful both
`as a cellular telephone and portable global positioning sys
`tem that provides latitude and longitude information
`remotely to a base unit display. The system includes a small
`hand held receiver that receives signals from a satellite glo
`bal positioning system and timing and computing circuits to
`provide location information signals. The hand held unit also
`includes a modem and transmitter to a cellular telephone
`network which is connected to the base unit computational
`system and display. The location of an individual or object
`can thus be determined at the remote station through the use
`of the cellular telephone network.
`
`
`
`acmuann "maunanun uuennnn QEMOTE UNIT
`
`BASE UNlT
`
`Unified Patents
`Exhibit 1015
`Page 12 of 16
`
`

`

`US 5,043,736 C2
`Page 2
`
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`’
`’
`awrence
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