Patents by Inventor Harold G. Plough

Harold G. Plough 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).

  • Therapeutic finger exercise devices
    Patent number: 4615522
    Abstract: An exercise device is formed from a generally single-piece, stiff frame having loops at the end of the frame for holding two non-adjacent fingers in a fixed position while leaving the remaining fingers free to exercise. This frame may be combined with a riser secured to the black keys on a piano for the purpose of exercising the hand and fingers. The riser is usable separately from the exercise device.
    Type: Grant
    Filed: July 13, 1984
    Date of Patent: October 7, 1986
    Inventor: Harold G. Plough