Patents by Inventor Eric J. Crews

Eric J. Crews 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).

  • Timing system
    Patent number: 4999604
    Abstract: Timing and warning system for use on a track involving a plurality of vehicles (12,13,14) including a series of stationary transceivers (15) located at selected locations along the track (11) and a mobile transmitter (18) located in each vehicle.
    Type: Grant
    Filed: July 27, 1989
    Date of Patent: March 12, 1991
    Inventor: Eric J. Crews
  • Timing system
    Patent number: 4857886
    Abstract: Timing system for use on a track involving a plurality of vehicles including a series of stationary transceivers located at selected locations along the track and a mobile transmitter located in each vehicle.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: August 15, 1989
    Inventor: Eric J. Crews