Patents by Inventor Frank Harold Hayward

Frank Harold Hayward 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).

  • Security device for garage doors
    Patent number: 3996591
    Abstract: A locking pin for a garage door is moved longitudinally in a bushing between a door frame and a movable door by an electric motor linked to the pin. The motor is selectively actuated in one direction by a radio receiver relay or a key switch. The motor moves the pin to its unlocked position and switches signal lamps from red to green. To lock the door again, a second radio signal or switching of the key switch opens a motor switch and a biasing spring in the motor returns the pin to its locking position.
    Type: Grant
    Filed: October 2, 1975
    Date of Patent: December 7, 1976
    Inventor: Frank Harold Hayward