Patents by Inventor Rodney F. Bergen

Rodney F. Bergen 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).

  • Door knob adapter
    Patent number: D268984
    Type: Grant
    Filed: December 19, 1980
    Date of Patent: May 17, 1983
    Assignee: Extend Incorporated
    Inventor: Rodney F. Bergen
  • Lever doorknob adaptor
    Patent number: D369086
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: April 23, 1996
    Assignee: Extend Incorporated
    Inventor: Rodney F. Bergen