Patents by Inventor William F. Warren

William F. Warren 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).

  • Can crusher
    Patent number: 4240341
    Abstract: A can crushing apparatus is disclosed comprising a reciprocating head which reciprocates between two fixed walls whereby on each stroke of the head, two crushing operations are performed. Automatic can feeding means, having safety switch prime mover activation capability mounted thereon, is provided. A trash container closure base for said apparatus is also disclosed.
    Type: Grant
    Filed: December 6, 1978
    Date of Patent: December 23, 1980
    Assignee: Robert Whipple
    Inventors: Robert L. Whipple, William F. Warren