1
Eliezer A Sheffer, Marco J Thompson: Vehicle tracking system. Trackmobile, Brown Martin Haller & McClain, June 8, 1993: US05218367 (449 worldwide citation)

A vehicle tracking system makes use of a conventional cellular telephone network including a plurality of fixed cellular transmitter sites each covering a predetermined area. The system includes a plurality of cellular signal processing units for installation at hidden locations in vehicles to be mo ...


2
Eliezer A Sheffer: Vehicle location system. TrackMobile, Rosen Dainow & Jacobs, October 8, 1991: US05055851 (446 worldwide citation)

A system for determining a location of a selected vehicle from which an alarm signal is generated which includes a fixed array of cellular sites each site having a wireless signal detecting and generating units each of which is capable of receiving an input alarm signal having a signal strength whic ...


3
Eliezer A Sheffer: Vehicle location system. TrackMobile, Rosen Dainow & Jacobs, January 2, 1990: US04891650 (432 worldwide citation)

A system for determining a location of a selected vehicle from which an alarm signal is generated which includes a fixed array of cellular sites each site having a wireless signal detecting and generating units each of which is capable of receiving an input alarm signal having a signal strength whic ...


4
Eliezer A Sheffer: Tracking system and method for tracking a movable object carrying a cellular phone unit, and integrated personal protection system incorporating the tracking system. Trackmobile, May 7, 1996: US05515419 (363 worldwide citation)

A tracking system for tracking a portable or mobile phone unit utilizes an array of fixed wireless signal transceivers forming part of a wireless telephone system. The phone unit includes a processor for generating an emergency signal on detection of an emergency condition and transmitting the emerg ...


5
Eliezer A Sheffer, Paul J Bouchard: Mobile telephone location system and method. Trackmobile, Brown Martin Haller & McClain, December 1, 1998: US05844522 (129 worldwide citation)

A wireless network based location system and method uses an existing wireless communication network to locate the position of any active phone or transceiver unit in the network. The system includes a plurality of agile vector sensor units, one each installed at each antenna site in the network, and ...


6
Eliezer A Sheffer, Shiv P Verma: Alarm system for enclosed area. TrackMobile, Brown Martin Haller & McClain, October 22, 1996: US05568535 (127 worldwide citation)

An alarm system for protecting premises comprises a fully integrated, alarm detecting cellular phone unit which is linked to various sensors in order to detect the sensor outputs. The cellular alarm unit includes, in addition to cellular phone functions, a formatter or processor for generating an em ...


7
Eliezer A Sheffer, Ronald J Chebra, Richard W Haff: System for interfacing an alarm reporting device with a cellular radio transceiver. VerSuS Technology, Weiser & Stapler, July 14, 1992: US05131019 (112 worldwide citation)

A system for interfacing an alarm reporting unit with a cellular radio transceiver so that the data which is produced by the alarm reporting unit is effectively matched to the radio transceiver, irrespective of its initial format, includes circuitry for matching the format of the alarm reporting uni ...


8
Eliezer A Sheffer: Supervised, interactive alarm reporting system. VerSuS Technology, Weiser & Stapler, June 25, 1991: US05027383 (78 worldwide citation)

An alarm reporting system includes a control unit which services a supervised derived channel communicator, and a one-way radio communicator (preferably via the cellular telephone network), to provide for interactive operation of the derived channel unit and the radio transmitter according to alarm ...


9
Eliezer A Sheffer: Supervised, interactive alarm reporting system. BT Telecom, Weiser & Stapler, September 19, 1989: US04868859 (75 worldwide citation)

A supervised, interactive alarm reporting system includes a local terminal comprised of a supervised derived channel communicator, and a one-way radio communicator (preferably via the cellular telephone network), which are connected by a control unit which provides for interactive operation of the d ...


10
Eliezer A Sheffer: Pattern-recognizing passive infrared radiation detection system. Weiser & Stapler, March 31, 1992: US05101194 (24 worldwide citation)

A passive infrared radiation (PIR) detection system permits data developed by the PIR detection system to be interpreted, to in essence "look into" a protected area and to positively determine the character of any images detected in the protected area. The system includes an array of PIR detectors f ...