Patents by Inventor Robert L. Hillman

Robert L. Hillman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Vehicle tracking and security system incorporating simultaneous voice and data communication
    Patent number: 6522265
    Abstract: A system that tracks and monitors a vehicle by utilizing cellular communication componentry and global positioning system componentry is disclosed. The system provides for simultaneous and continuous transmission of a voice signal and location data to a monitoring center. The monitoring center comprises componentry to communicate with the vehicle and determine the vehicle's location on a digitized map using a computer.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: February 18, 2003
    Assignee: Navox Corporation
    Inventors: Robert L. Hillman, Barry L. Dorr
  • Vehicle tracking and security system incorporating simultaneous voice and data communication
    Patent number: 6320535
    Abstract: A system that tracks and monitors a vehicle by utilizing cellular communication componentry and global positioning system componentry is disclosed. The system provides for simultaneous and continuous transmission of a voice signal and location data to a monitoring center. The monitoring center comprises componentry to communicate with the vehicle and determine the vehicle's location on a digitized map using a computer. In one embodiment, the location data is modulated onto a carrier and the modulated carrier is inserted into a relatively narrow band of frequencies that have been removed from an audio data channel such as, for example, a cellular telephone voice channel.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: November 20, 2001
    Assignee: Navox Corporation
    Inventors: Robert L. Hillman, Barry L. Dorr
  • Vehicle tracking and security system incorporating simultaneous voice and data communication
    Patent number: 6140956
    Abstract: A system which tracks and monitors a vehicle by utilizing cellular communication componentry and global positioning system componentry is disclosed. The system provides for simultaneous and continuous transmission of a voice signal and location data to a monitoring center. The monitoring center comprises componentry to communicate with the vehicle and determine the vehicle's location on a digitized map using a computer.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: October 31, 2000
    Assignee: Cellutrac, Inc.
    Inventors: Robert L. Hillman, Barry L. Dorr