Patents by Inventor Jeffrey Lawrence Bull

Jeffrey Lawrence Bull 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).

  • Towed vehicle brake
    Patent number: 4084859
    Abstract: A braking system for towed vehicles adapted for mounting on the towed vehicle which comprises, electrical slave apparatus to apply the brakes proportionally to applied current, and actuated under control of a speed sensing device which generally increases braking force in proportion to increase in the speed of the vehicle as determined by the speed sensing device, the braking being initiated by the braking system of the vehicle.
    Type: Grant
    Filed: March 21, 1977
    Date of Patent: April 18, 1978
    Assignee: Ian R. Murphy
    Inventors: Jeffrey Lawrence Bull, Tanya Ellen Murphy, Laurence Ernest Gibson