Patents by Inventor John R. Copping

John R. Copping 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).

  • Method of making microwave oven seal structure
    Patent number: 4102041
    Abstract: A microwave oven having a door formed from metal structural elements which are welded together and coated with a nonconductive coating. Solid dielectric portions of the microwave seal choke are inserted into the choke regions of the door seal, and slotted portions of one of the steel structural elements are then deformed to form the choke and to lock the solid dielectric portions in place.
    Type: Grant
    Filed: March 28, 1977
    Date of Patent: July 25, 1978
    Assignee: Amana Refrigeration, Inc.
    Inventors: John R. Copping, Richard A. Foerstner