Patents by Inventor Mark Vollenweider

Mark Vollenweider 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).

  • Electronic drum with curved playing surface
    Patent number: 4924741
    Abstract: An electronic drum has cylindrical non-planar playing surface, and a force sensing detection unit is attached to the playing surface. The force sensing detection unit converts external striking forces applied to the playing surface into electrical output pulses. The electronic drum is attached to a mount shaft assembly with a resilient portion interposed between the electronic drum and the mount shaft. The mount shaft assembly enables the electronic drum to be mounted onto various support stands.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: May 15, 1990
    Inventor: Mark Vollenweider