Patents by Inventor Earl Birk

Earl Birk 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).

  • Microwave oven door having a conformable screen
    Patent number: 4292488
    Abstract: A microwave oven having a door configured to minimize the leakage of microwave energy is disclosed. The door includes a flat sheet of glass and a flexible metal screen substantially overlying the glass sheet. The glass and the metal screen are held in substantially coplanar relationship in a frame. The edges of the metal screen are deformed such that the mounting of the metal screen in the frame causes the central portion of the metal screen to bow away from the glass. When the door is closed the metal screen conforms to the oven front panel.
    Type: Grant
    Filed: June 25, 1980
    Date of Patent: September 29, 1981
    Assignee: Litton Systems, Inc.
    Inventor: Earl Birk