Patents by Inventor Frank Klimas

Frank Klimas 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).

  • Abnormal use indicator for door lock
    Patent number: 6047577
    Abstract: A door lock particularly suited for an apartment or condominium where the resident has an entry key and management personnel also have a key that will allow access to the apartment, the door lock having a spring loaded axial pin which is retained in an externally visible position when the lock is actuated by the resident's key and which is released to an externally non-visible position when the lock is actuated by the management key.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: April 11, 2000
    Inventor: Frank Klimas