Patents by Inventor Robert Yff

Robert Yff 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).

  • Radiation resistant sliding door
    Patent number: 5197225
    Abstract: A door closure mechanism comprising a frame and sliding door adapted to close a doorway to effect a shield against electromagnetic radiation and other environmental conditions. The sliding door is suspended for lateral movement and is adapted to bear against the frame and be secured to it to effect a seal.
    Type: Grant
    Filed: August 20, 1992
    Date of Patent: March 30, 1993
    Assignee: Panashield, RF and Audio Shielding, Inc.
    Inventor: Robert Yff