1
Norman F Krasner: GPS receiver and method for processing GPS signals. Precision Tracking, Blakely Sokoloff Taylor & Zafman, September 2, 1997: US05663734 (465 worldwide citation)

A GPS receiver in one embodiment includes an antenna which receives GPS signals at an RF frequency from in view satellites; a downconverter coupled to the antenna for reducing the RF frequency of the received GPS signals to an intermediate frequency (IF); a digitizer coupled to the downconverter and ...


2
Alan C Heller, Brian M Evins, Robert G Karp: Method and apparatus for locating personnel and objects in response to telephone inquiries. Precision Tracking FM, Pravel Hewitt Kimball & Krieger, August 20, 1996: US05548637 (326 worldwide citation)

An automated position location system is provided which, in response to a telephone caller's inquiry and without human intervention, connects the caller directly to the telephone extension located nearest the individual or object of interest. A transmitter is attached to each individual (or object) ...


3
Alan C Heller, Christopher W Fox: Method for receiving and transmitting optical data and control information to and from remotely located receivers and transmitters in an optical locator system. Precision Tracking FM, Cox & Smith, February 7, 1995: US05387993 (321 worldwide citation)

The method for receiving and transmitting optical data and control information to and from remotely located receivers and transmitters in an optical location system. Wherein, the locator system tracks and locates the position of a main object having an attached transceiver. This transceiver has stor ...


4
Alan C Heller, Steven Springmeyer, Christopher W Fox: Sensory and control system for local area networks. Precision Tracking FM, Pravel Hewitt Kimball & Krieger, November 5, 1996: US05572195 (156 worldwide citation)

An object location, control, and tracking system is implemented using an object identifier variable-based protocol such as SNMP. Infrared sensors, touch memory ports, passive infrared sensors, and external device controllers are all accessed using object identifier variables and in this way stimuli ...


5
Alan C Heller, Christopher W Fox, Philip D Olivier: Optical receiver for area location system. Precision Tracking FM, Baker & Botts, October 11, 1994: US05355222 (51 worldwide citation)

An optical location system for locating the position of a moving object in a defined area. An optical transmitter is attached to the moving object. A stationary receiver has a number of sensors for receiving a signal from the transmitter. One sensor has a field of view of the entire area. Other sens ...


6
Alan C Heller, Albert C McNamara Jr: Optical receiver for area location system. Precision Tracking FM, Baker & Botts, January 4, 1994: US05276496 (42 worldwide citation)

An optical receiver for use with an optical location system that locates a target in a defined area. A spherical lens is placed over the area. The area is divided into sections, with a sensor associated with each section. These sensors receive light transmitted through the lens, and are positioned r ...


7
Alan C Heller: Location system adapted for use in multipath environments. Precision Tracking FM, Akin Gump Strauss Hauer & Feld, July 25, 2000: USRE036791

A radiolocation system for multipath environments, such as for tracking objects in a semiconductor fabrication facility (FIGS. 1a-1b), includes an array of receivers (20) distributed within the tracking area, coupled to a system processor (40) over a LAN. A TAG transmitter (30) located with each obj ...


8
Alan C Heller, Christopher W Fox: Method for receiving and transmitting optical data and control information to and from remotely located receivers and transmitters in an optical locator system. Precision Tracking FM, Akin Gump Strauss Hauer & Feld, January 25, 2000: USRE036530

The method for receiving and transmitting optical data and control information to and from remotely located receivers and transmitters in an optical location system. Wherein, the locator system tracks and locates the position of a main object having an attached transceiver. This transceiver has stor ...


9
Heller Alan Camerik, Fox Christopher Wayne, Olivier Philip D: Optical receiver for area location system.. Precision Tracking Fm, March 1, 1995: EP0640206-A1

An optical location system for locating the position of a moving object in a defined area. An optical transmitter is attached to the moving object. A stationary receiver has a number of sensors for receiving a signal from the transmitter. One sensor has a field of view of the entire area. Other sens ...


10
Heller Alan Camerik, Fox Christopher Wayne, Olivier Philip D: Optical receiver for area location system. Precision Tracking Fm, MARESH Catherine C, November 25, 1993: WO/1993/023719

An optical location system for locating the position of a moving object in a defined area. An optical transmitter is attached to the moving object. A stationary receiver has a number of sensors for receiving a signal from the transmitter. One sensor has a field of view of the entire area. Other sens ...