1
Doron Ben Yehezkel, James E Forman, John A Baker: Method and apparatus for providing location-based information services. Teletrac, Roylance Abrams Berdo & Goodman L, April 11, 2000: US06049711 (210 worldwide citation)

A method and system for providing location-based information services to a requesting user. A subscriber unit transmits an access request message comprising an identification number to one or more receiving sites on a response channel. A forward channel message is sent to the subscriber unit, the fo ...


2
William K Goshay, Joseph W Sheehan, Barry D Atkinson, Edward A Hurst, Richard A Jackson, Mario Proietti: Remotely distributed location and messaging system. Teletrac, Roylance Abrams Berdo & Goodman L, September 1, 1998: US05802454 (150 worldwide citation)

A network of interconnected, remotely distributed, location and messaging systems. Each of the remotely distributed location and messaging systems can be dynamically configured to use different frequencies that are assigned to the regions. Each of the remotely distributed location and messaging syst ...


3
Mario Proietti: Integrated mobile unit location services and cellular telephone services. Teletrac, Roylance Abrams Berdo & Goodman L, July 7, 1998: US05778315 (46 worldwide citation)

An apparatus and method for sharing cellular telephone subscriptions among a plurality of mobile units in a mobile unit location system. Requests for cellular service are transmitted from a mobile unit to a cellular phone identity service provider via the mobile unit location system. The service pro ...


4
Darwin O Thompson Jr: Fixed site monitor using a location-based communications network. Teletrac, Roylance Abrams Berdo & Goodman L, February 17, 1998: US05719563 (19 worldwide citation)

A method for monitoring and controlling remote site parameters by using a location-based communications network. The system uses monitoring and control devices that are located at remote locations and controlled and monitored either at a control center or at a workstation which can request data resp ...