Patents by Inventor Roy D. Chamberlain

Roy D. Chamberlain 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).

  • Clay target throwing device support
    Patent number: 4770155
    Abstract: An apparatus for mounting a clay target throwing machine on a towing hitch ball which is coupled with a vehicle or a post anchored in the ground. A framework is coupled with an upright cylinder which engages the hitch ball or post allowing movement or apparatus about the vertical axis of the hitch ball or post.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: September 13, 1988
    Inventors: David L. Chamberlain, Roy D. Chamberlain