Patents by Inventor Lee H. Gilbert

Lee H. Gilbert 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).

  • Passive keyless entry system
    Patent number: 5515036
    Abstract: A passive keyless entry system that is specifically adapted for use with automotive vehicles is designed to automatically unlock the vehicle as the operator approaches the vehicle. The system is further designed to automatically lock the vehicle as the operator, carrying the beacon, moves away from the vehicle. The system includes a portable beacon that is carried by the operator, a receiver/controller located in the vehicle, and an antenna connected to the receiver/controller for receiving the encoded transmission from the beacon. The beacon includes a motion sensor to conserve battery life when the beacon is stationary. Transmission between the beacon and the receiver/controller is characterized by a magnetically coupled radio frequency signal embodying differential phase encoded data with error correction coding of the data to enhance noise immunity and signal discrimination.
    Type: Grant
    Filed: January 26, 1995
    Date of Patent: May 7, 1996
    Assignee: Lectron Products, Inc.
    Inventors: Thomas J. Waraksa, Keith D. Fraley, Richard E. Kiefer, Daniel G. Douglas, Lee H. Gilbert
  • Passive keyless entry system
    Patent number: 5319364
    Abstract: A passive keyless entry system is disclosed that is specifically adapted for use with automotive vehicles. The system is designed to automatically unlock the vehicle as the operator approaches the vehicle. The system is further designed to automatically lock the vehicle as the operator, carrying the beacon, moves away from the vehicle. The system includes a portable beacon that is carried by the operator, a receiver/controller located in the vehicle, and an antenna connected to the receiver/controller for receiving the encoded transmission from the beacon. The beacon includes a motion sensor to conserve battery life when the beacon is stationary. Transmission between the beacon and the receiver/controller is characterized by a magnetically coupled radio frequency signal embodying differential phase encoded data with error correction coding of the data to enhance noise immunity and signal discrimination.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: June 7, 1994
    Assignee: Lectron Products, Inc.
    Inventors: Thomas J. Waraksa, Keith D. Fraley, Richard E. Kiefer, Daniel G. Douglas, Lee H. Gilbert
  • Passive keyless entry system
    Patent number: 4942393
    Abstract: A passive keyless entry system is disclosed that is specifically adapted for use with automotive vehicles. The system is designed to automatically unlock the vehicle as the operator approaches the vehicle. The system is further designed to automatically lock the vehicle as the operator, carrying the beacon, moves away from the vehicle. The system includes a portable beacon that is carried by the operator, a receiver/controller located in the vehicle, and an antenna connected to the receiver/controller for receiving the encoded transmission from the beacon. The beacon includes a motion sensor to conserve battery life when the beacon is stationary. Transmission between the beacon and the receiver/controller is characterized by a magnetically coupled radio frequency signal embodying differential phase encoded data with error correction coding of the data to enhance noise immunity and signal discrimination.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: July 17, 1990
    Assignee: Lectron Products, Inc.
    Inventors: Thomas J. Waraksa, Keith D. Fraley, Richard E. Kiefer, Daniel G. Douglas, Lee H. Gilbert