Patents by Inventor Frank Knapp

Frank Knapp 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).

  • Animal spray
    Patent number: 4165715
    Abstract: A frame supporting spray means is in the form of a stall, open at one end and closed at the other end by a trough; nothing happens when the animal enters, so he enters unsuspectingly, but he gets the full treatment when he backs out.
    Type: Grant
    Filed: March 9, 1978
    Date of Patent: August 28, 1979
    Inventor: Frank Knapp