1
George R Cooper, Raymond W Nettleton: Spread spectrum apparatus for cellular mobile communication systems. Purdue Research Foundation, John R Nesbitt, September 9, 1980: US04222115 (272 worldwide citation)

An apparatus is disclosed for a cellular mobile communication system utilizing a spread spectrum. A plurality of fixed base stations is connected with a central processor so that calls originating in any cell can terminate in any other cell. The available frequency spectrum is divided such that one- ...


2
David L Ladner, Andrea J Grazzini, Ronald E Konezny: Mobile locator system. Peoplenet, Westman Champlin & Kelly PA, December 18, 2001: US06331825 (216 worldwide citation)

A locator system comprises a locator device, a control center, a workstation and a computerized interface. The control center and the locator device are configured to communicate via cellular and pager signals.


3
Anderson Roy E, Merigo Miguel A: Mobile locator system for metropolitan areas. General Electric Company, July 25, 1972: US3680121 (81 worldwide citation)

A locator system is disclosed wherein the vehicle whose location is unknown transmits a short, modulated radio frequency pulse. Receiving stations about the periphery of the area being serviced phase compare the received signal with a standard time reference signal. The phase difference is used to d ...


4
Eric T Heinze, Gregg J Haensgen, Christopher M Hofmeister: Mobile locator system and method. RF Technologies, Foley & Lardner, September 25, 2007: US07274294 (11 worldwide citation)

A locator system includes a handheld unit for providing an interrogation signal. The handheld unit can be a handheld computer or PDA including an RF module. The interrogation signal is received by an RF tag. The RF tag can include a power source and a memory. The memory can store an indication of th ...


5
Eric T Heinze, Gregg J Haensgen, Nathan J Gerner: Mobile locator system and method with wander management. RF Technologies, Foley & Lardner, April 29, 2008: US07365645 (9 worldwide citation)

A locator/wander management system includes a handheld unit for providing an interrogation signal. The handheld unit can be a handheld computer or PDA including an RF module. The interrogation signal is received by an RF tag. The RF tag can include a power source and a memory. The memory can store a ...


6
David Kodrin, Lawrence Hutchings, Paul Kasameyer, Anthony Mathews, Stephen Jarpe: Devices, systems and method of determining the location of mobile personnel. Mine Safety Appliances Company, The Webb Law Firm, October 16, 2012: US08289154 (1 worldwide citation)

A locator system for use in connection with at least one mobile person includes a mobile locator system adapted to be worn by the person, wherein the mobile locator system includes an inertial navigation system. The locator system further includes a reference locator system to provide information ab ...


7
Eric T Heinze, Gregg J Haensgen, Christopher M Hofmeister: Mobile locator system and method. RF Technologies, Foley & Lardner, August 10, 2006: US20060176177-A1

A locator system includes a handheld unit for providing an interrogation signal. The handheld unit can be a handheld computer or PDA including an RF module. The interrogation signal is received by an RF tag. The RF tag can include a power source and a memory. The memory can store an indication of th ...


8
Eric T Heinze, Gregg J Haensgen, Nathan J Gerner: Mobile locator system and method with wander management. RF Technologies, Foley & Lardner, August 24, 2006: US20060187045-A1

A locator/wander management system includes a handheld unit for providing an interrogation signal. The handheld unit can be a handheld computer or PDA including an RF module. The interrogation signal is received by an RF tag. The RF tag can include a power source and a memory. The memory can store a ...


9
David Kodrin, Stephen Jarpe, Lawrence Hutchings, Paul Kasameyer, Anthony Matthews: Devices, Systems and Method of Determining the Location of Mobile Personnel. Mine Safety Appliances Company, Mine Safety Appliances Company, January 14, 2010: US20100007485-A1

A locator system for use in connection with at least one mobile person includes a mobile locator system adapted to be worn by the person, wherein the mobile locator system includes an inertial navigation system. The locator system further includes a reference locator system to provide information ab ...


10