Patents by Inventor Leamon A. Gilbert

Leamon A. 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).

  • Doorknob security device
    Patent number: 4899564
    Abstract: The present invention entails a doorknob security device for preventing access to the outer surface of the doorknob and particularly to a keyhole or other locking and unlocking mechanisms formed about the surface of the knob. In particular, the security device of the present invention comprises an outer main housing and a rotatable inner closure panel. The inner closure panel is rotatable from a closed to an open position. In the open position the security device easily accepts a doorknob. In the closed position the security device encompasses and closes the doorknob preventing access to the same.
    Type: Grant
    Filed: June 3, 1988
    Date of Patent: February 13, 1990
    Inventor: Leamon A. Gilbert