Patents by Inventor Merwin E. Tarr

Merwin E. Tarr 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 locking apparatus
    Patent number: 5297407
    Abstract: A collar member is arranged to receive a trailer pin to effect surrounding of the trailer pin in order to prevent access to the trailer pin for unauthorized removal of the associated trailer structure. To this end, the collar includes a channel having a floor, and the channel further including a U-shaped rib arranged to guide a locking head onto the rib to secure the locking head within the channel and effect surrounding of the collar preventing access thereto.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: March 29, 1994
    Inventor: Merwin E. Tarr