Patents by Inventor Charles I. Schrader

Charles I. Schrader 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).

  • Damper control
    Patent number: 4313418
    Abstract: A damper control system wherein a control screw is threadedly mounted in a door and engages a depending contact arm on a damper to move the damper between a closed position and various open positions.
    Type: Grant
    Filed: March 18, 1980
    Date of Patent: February 2, 1982
    Assignee: Janice E. Schrader
    Inventors: Charles I. Schrader, Janice E. Schrader