Patents by Inventor Michael F. Farquhar

Michael F. Farquhar 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).

  • Trailer hitch lock
    Patent number: 5332251
    Abstract: A trailer hitch lock assembly for disabling the trailer hitch of an unattached trailer to prevent theft of the trailer. The trailer hitch lock obstructs access to the trailer eyelet in the drawbar of the trailer hitch to prevent unauthorized hitching of the trailer to a truck with a military hitch. The trailer hitch lock comprises an upper bolt plate with a bolt that that extends through the eyelet of the trailer hitch and engages a lower shield plate. A padlock engages a hole in the end o the bolt to secure the bolt plate and the shield plate together. The shield plate has a cylindrical shield which surrounds and protects the padlock from tampering.
    Type: Grant
    Filed: July 15, 1993
    Date of Patent: July 26, 1994
    Inventor: Michael F. Farquhar