Patents by Inventor Lawrence J. Rotar

Lawrence J. Rotar 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).

  • Lock nut for automobile stereo systems
    Patent number: 4668143
    Abstract: The present invention is directed to a locking device to frustrate unauthorized removal of stereo systems and like assemblies from automobiles or trucks. The device includes a frusto-conically shaped housing with a rotation prevention mechanism fastened therein. A plurality of spaced nubs function to prevent removal of the locking device from the threaded shaft of the electronics unit without a tool having the proper combination of mating openings to receive the nubs.
    Type: Grant
    Filed: August 30, 1984
    Date of Patent: May 26, 1987
    Inventor: Lawrence J. Rotar