Patents by Inventor Joseph M. Yadrick

Joseph M. Yadrick 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 lock apparatus
    Patent number: 4626008
    Abstract: A locking prevention apparatus for attachment to the locking shaft of a passage lock door knob assembly for an interior door consists of a split ring of substantially rigid material which engages circumferentially the external surface of the locking shaft between the interior door knob and the interior face plate of said door knob assembly to limit translational motion of the interior door knob along the locking shaft toward the interior face plate.
    Type: Grant
    Filed: November 21, 1983
    Date of Patent: December 2, 1986
    Inventor: Joseph M. Yadrick