Patents by Inventor Howard F. Callis

Howard F. Callis 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).

  • Adjustable rake head and improved handle support
    Patent number: 4477114
    Abstract: A system for gathering and transporting debris from a surface including first and second rakes having an adjustable head relative to the handle of the rake and a strap on a topmost portion of each rake handle adapted to attach to forearms of the user and handgrips disposed below the straps on each of the rakes for grasping by the hands of the user, each rake adapted to be operatively associated with one of two hands of the user and used in concert so that the rakes can be used to put debris between the two rake heads and be lifted up.
    Type: Grant
    Filed: May 12, 1983
    Date of Patent: October 16, 1984
    Inventor: Howard F. Callis