Patents by Inventor Richard P. Crippen

Richard P. Crippen 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).

  • Rake tine construction
    Patent number: 5241812
    Abstract: A spring tine rake having a plurality of raking tines formed from a flat resilient material with the upper portions thereof mounted in fixed relation on a handle and having a 90 degree twist therein to orient the lower blade portions of the tines in an upstanding plane generally parallel to the direction of the raking action.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: September 7, 1993
    Inventor: Richard P. Crippen