Lojack Operating Company, LP

Lojack Corporation

William R Duvall

Joseph Thaddeus Lipowski

Rod DeMille

James A Justice

Vincentzio Isachar Roman

Claude Arpin

Arvind K Ramadorai

Thomas A Wooters

A combined proximity monitoring and locating system including a wearable unit, a proximity detector, and a control subsystem. The proximity detector includes a receiver for receiving the wearable unit transmitter signal, a processing subsystem configured to signal an alert if the wearable unit transmitter signal strength is below a pre-established minimum, and a tracking subsystem configured to assist in locating the wearable unit based on the signal strength of the wearable unit transmitter signal. A control subsystem is responsive to an indication that the alert has been signaled. The control subsystem includes an RF transmitter configured to transmit a transponder activation signal, and an RF antenna network for relaying the transponder activation signal to a receiver of the portable unit to activate the transponder thereof. A tracking unit includes a receiver configured to receive the transponder signal of the wearable unit to locate the wearable unit.

Proximity monitoring and locating system

A method of expanding the activation and tracking capability of a limited number of stolen vehicle recovery dedicated radio-frequency networks activated from a control center upon notification of the theft of the vehicle includes supplementarily using more numerous widely geographically provided cellular-telephone frequency band networks to respond to the control center to indicate rough location of the stolen vehicle, while the recovery networks provide fine tracking of the vehicle for recovery.

Method of and apparatus for utilizing geographically spread cellular radio networks to supplement more geographically limited stolen vehicle recovery networks in activation of radio tracking and recovery of such vehicles

An asset location, tracking, and recovery system and method includes a network of VHF towers and a control center receiving signals from and transmitting signals to the VHF towers. Primary locating units each include a transmitter, a receiver, and a transponder activated when a signal is transmitted by the control center via the VHF towers to the receiver. Auxiliary locating units include at least a transmitter emitting a signal received by at least one primary locating unit receiver which relays that signal to the control center via the VHF towers from the primary locating unit transmitter.

Asset recovery system

A system and technique for improving the speed and ease of missing vehicle location and recovery by vehicle-carried transponder periodic coded replies to radio interrogation by a network of (VHF) transmitting towers, by integrating a concealed GPS location receiver with the transponder and providing the GPS-obtained coordinate information through the VHF network to enable a preliminary initial recovery location from which to home-in for recovery by subsequent direction-finding from the periodic transponder responses. Other location-on-demand services are also readily operable through the use of this VHF network, including providing said GPS coordinate or location information on the Internet.

Method of and system for expanding localized missing customer-vehicle law enforcement-aided VHF recovery networks with location-on-demand supplemental service features via such networks for improved law enforcement-aided recovery, and via the internet for providing supplemental customer service features

Extending the activation and tracking capability of stolen vehicle recovery dedicated radio-frequency networks by the supplementary use of widely geographically provided cellular telephone-frequency band networks.

Method of and apparatus for utilizing geographically spread cellular radio networks to supplement more geographically limited stolen vehicle recovery radio networks in activation of radio tracking and recovery of such vehicles

A technique for adding to the security of vehicle inspection and the facility for radio-tracking of a vehicle attempting escape from the inspector, embodying the use of a miniaturized specifically coded self-powered radio-transponder or transmitter temporarily attachable by the inspector externally to a stopped vehicle and trackable in the event of vehicle escape.

Method of and apparatus for vehicle inspection and the like with security for the inspector and facility for radio tracking of a vehicle attempting escape from the inspector

A novel method of and system for enabling the use of one portable cellular phone only, in voice communication with a cellular network control center for voice-requesting position or location data services, and, with the aid of a vehicle GPS-transponder activated in response to signaling from the control center over cellular network channel control paths, to receive and process at the vehicle GPS location data from satellites, and to transmit the data over the said channel control paths to the control center, for then sending therefrom to the user of the portable cellular phone.

Methods of and system for portable cellular phone voice communication and positional location data communication using the cellular phone network control channel

A novel method of and system for enabling the use of one portable cellular phone only in voice communication over a radio voice channel with a cellular network control center for voice-requesting position or location data or other services; and, with the aid of a vehicle GPS-transpoder activated in response to signaling from the control center over a separate radio-data channel path, to receive and process at the vehicle GPS location,data from satellites, and to transmit the location data over the said data control path to the control center; and for then sending such data and information therefrom to the user of the portable cellular phone&#x2014;the system being also adaptable for use by dispatcher managers of fleets of vehicles.

Method and system for portable cellular phone voice communication and positional location data communication

A technique and apparatus for dynamically establishing and varying GeoFencing of a GPS-processor equipped vehicle or the like by providing specialized software and firmware at the vehicle processor to enable internal calculation of shape and size of GeoFences about the vehicle upon commands of the control center station, and without the necessity for such calculation or data point information transmission from the station.

Method of and apparatus for dynamically GoeFencing movable vehicle and other equipment and the like

A vehicle-tracking radio transponder used in stolen vehicle recovery systems and in which the same transponder is also synergistically accessed for panic or emergency operator activation and for sensed unauthorized moving or starter circuit tampering independently of and without interfering with the stolen vehicle recovery command signal control of the transponder.

Growing community of inventors

Sudbury, MA, United States of America

William R Duvall