1
Leonard Schuchman, Ronald Bruno, Robert Rennard, Charles Moses: Hybrid GPS/data line unit for rapid, precise, and robust position determination. Stanford Telecommunications, Jim Zegeer, November 15, 1994: US05365450 (270 worldwide citation)

A global positioning system (GPS) in which a plurality earth orbiting satellites transmit position information to mobile radio stations on earth, is provided with a separate source satellite position data broadcast digital channels and one or more dial-up service separate communication channels (sel ...


2
Ronald Bruno, Leonard Schuchman, Kenneth Cunningham, Robert McCarthy: System for providing a simultaneous data and voice channel within a single channel of a portable cellular telephone to provide position-enhanced cellular services (PECS). ITT Manufacturing Enterprises, Jim Zegeer, May 1, 2001: US06226529 (246 worldwide citation)

An accessory device for portable telephones which provides simultaneous functionality of a hands-free accessory device and a data-in-voice modem enabling a portable telephone to be used in a vehicle such that the driver can be engaged in a hands-free conversation at the same time as data (such as GP ...


3
G Daniel Urban, Robert McCarthy, David Schuchman, Ronald Bruno: Position enhanced cellular telephone system. Stanford Telecommunications, Jim Zegeer Esq, May 13, 1997: US05630206 (216 worldwide citation)

A position monitoring system having a position finder subsystem connected via a cellular telephone to a central monitoring station, a receive/transmit device carried with the position monitoring subsystem. A remote personal signalling subsystem comprising an RF coder modulator for transmitting a cod ...


4
Leonard Schuchman, Ronald Bruno, Charles Moses: Cellular telephone with voice-in-data modem. Stanford Telecommunications, Jim Zegeer Esq, March 10, 1998: US05726893 (154 worldwide citation)

A GPS system has a plurality of satellites transmitting time and location data over radio frequency signals which enable a mobile GPS receiver on the ground to determine its position, includes a source of satellite data message block containing the ephemeris and time modes of the GPS satellites whic ...


5
Leonard Schuchman, John E Miller, Ronald Bruno: Digital audio broadcasting system. Stanford Telecommunications, Jim Zegeer, February 1, 1994: US05283780 (139 worldwide citation)

A digital audio broadcasting system that is capable of providing a large number of high quality stereophonic channels to mobile receivers in an environment with severe multipath delay and fading. Optimum combination of frequency and time diversity to guarantee robust performance in the mobile channe ...


6
Ronald Bruno, Leonard Schuchman, Lloyd Engelbrecht: Position enhanced communication system including system for embedding CDMA navigation beacons under the communications signals of a wireless communication system. Stanford Telecommunications, Jim Zegeer Esq, February 18, 1997: US05604765 (116 worldwide citation)

A cellular telephone system having three or more cell sites with each cell site having a source of cellular communication signals and an RF transmitter and antenna for broadcasting the cellular communication signals. A direct sequence spread spectrum waveform carrying navigation signals is embedded ...


7
Leonard Schuchman, Ronald Bruno, Lloyd Engelbrecht, Aaron Weinberg: Cellular positioning system (CPS). Stanford Telecommunications, Jim Zegeer, August 29, 2000: US06111538 (86 worldwide citation)

Positioning system for locating a mobile body comprising a plurality of earth based spread spectrum (SS) broadcasting stations arranged geographically in a cellular pattern. Each SS broadcasting station include a modulator providing a channel signal structure which is substantially orthogonal with r ...


8
Leonard Schuchman, Ronald Bruno: Chirped spread spectrum positioning system. Stanford Telecommunications, Jim Zegeer Esq, December 23, 1997: US05701328 (63 worldwide citation)

Positioning system for locating a mobile body comprising a plurality of earth based spread spectrum (SS) broadcasting stations arranged geographically in a cellular pattern. Each SS broadcasting station include a modulator providing a channel signal structure which is substantially orthogonal with r ...


9
Leonard Schuchman, Ronald Bruno, John Kefaliotis, Steve Greenberg, Edward J Zakrzewski: Air traffic surveillance and communication system. Stanford Telecommunications, Jim Zegeer Esq, August 25, 1998: US05798726 (45 worldwide citation)

Air traffic surveillance and communication system for air traffic controllers includes a plurality of ground based first digital radio transceivers, each first digital radio transceiver being located in specific geographic sectors, respectively, and having a first frequency channel for supporting pa ...


10
Ronald Bruno, Leonard Schuchman: Multi-access CS-P/CD-E system and protocols on satellite channels applicable to a group of mobile users in close proximity. Stanford Telecommunications, Jim Zegeer, April 11, 2000: US06049548 (42 worldwide citation)

A multiple access RF communication system in which a plurality of mobile user transceivers communicate with a central hub transceiver through an earth orbiting satellite, and wherein groups of mobile user transceivers in close proximity with each other share a common multi-access inbound (to hub) fr ...