Patents by Inventor David B. Edgett

David B. Edgett 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).

  • Torque modification apparatus for use with a door closer
    Patent number: 4788742
    Abstract: A torque modification device for use with a pocket door which is adaptable to modify the torque applied by a door closer to the door to increase the torque when the door approaches its fully latched condition.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: December 6, 1988
    Assignee: Door Control Specialties Co.
    Inventors: David B. Edgett, Richard L. Zunkel