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
Leonard Schuchman, Aaron Weinberg, Lloyd Engelbrecht: No-outage GPS/commercial RF positioning system. Stanford Telecommunications, Jim Zegeer, June 6, 1995: US05422813 (222 worldwide citation)

The present invention relates to a no outage GPS/AM position finding system wherein a GPS system having a plurality of satellites transmits time and location data over radio frequency signals to enable a mobile GPS receiver station on the ground to determine its position, and a cellular telephone is ...


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, Kenneth Cunningham, Joseph Smallcomb: Universal interactive set-top controller for downloading and playback of information and entertainment services. Stanford Telecommunications, Jim Zegeer Esq, June 17, 1997: US05640453 (140 worldwide citation)

A universal interactive control system for the downloading and playback of information and entertainment services from one or more network distribution centers, said one or more network distribution centers providing information and entertainment signals selected from video and audio programs, video ...


6
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 ...


7
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 ...


8
Leonard Schuchman, Ronald C Bruno, John Kefaliotis, Steve Greenberg, Edward J Zakrzewski: Air traffic surveillance and communication system. Stanford Telecommunications, Jim Zegeer, October 17, 1995: US05459469 (99 worldwide citation)

An air traffic surveillance and communication system for air traffic controllers, includes a plurality of ground based first radio transceivers located in specific geographic sectors, respectively, and having a first frequency channel for supporting party-line digital voice and a second frequency ch ...


9
Lloyd Engelbrecht, Leonard Schuchman: Positioning system for CDMA/PCS communications system. ITT Manufacturing Enterprises, Jim Zegeer, November 14, 2000: US06148219 (90 worldwide citation)

Base station and system modifications to a digital cellular telephone system that measures location of a mobile station from its normal transmissions, and can forward the measured position to that station or some other authorized caller or service on the communication network. Range measurement is e ...


10
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 ...