Patents by Inventor Michael F. Kern

Michael F. Kern 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).

  • Tamperproof lock and method
    Patent number: 4031730
    Abstract: An apparatus is disclosed for preventing tampering with a locking mechanism, such as the conventional cylinder lock, which has a keyway therein and is normally rotatable when a key is in the keyway. A locking arm normally holds the locking mechanism to prevent rotation thereof even when the key or a foreign device is in the keyway. In order to release the locking arm and rotate the locking mechanism, access to the keyway is first blocked thereby prohibiting someone from attempting to pick the lock with a foreign device.
    Type: Grant
    Filed: February 4, 1976
    Date of Patent: June 28, 1977
    Inventor: Michael F. Kern