Patents by Inventor Rick Trankle

Rick Trankle 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).

  • Percussion accessory
    Patent number: 4179974
    Abstract: Two layers of rubber are sandwiched about a layer of metal to provide a surface for practicing drumming. The bottom surface of the bottom layer is roughened to reduce sliding. The device may also be positioned on its side and struck on its opposite side to simulate the striking of cymbals, or placed on the drum surface to dampen undesirable vibrations.
    Type: Grant
    Filed: July 7, 1978
    Date of Patent: December 25, 1979
    Inventor: Rick Trankle