Patents by Inventor Mark J. Whinton

Mark J. Whinton 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).

  • Patent number: 5595080
    Abstract: A lock condition indicator device which is adapted for affixation to a key for a cylinder lock has a substantially circular movable means adapted to be retained in juxtaposition to a head portion of the key, but rotatable about a longitudinal axis of the key when an engaging means on the circumference of the movable means encounters an obstructing means on an outer surface of the lock, resulting in the movable means being rotated into one of a plurality of indicator positions.
    Type: Grant
    Filed: September 5, 1995
    Date of Patent: January 21, 1997
    Inventor: Mark J. Whinton