Patents by Inventor Edwin Norbeck

Edwin Norbeck 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).

  • Pad for woodwind musical instrument
    Patent number: 4114500
    Abstract: A pad for closing the tone hole of a woodwind instrument is formed of a disc of silicone rubber having a compression set at room temperature after 22 hours no greater than about 5%.The edge surfaces of the disc are tapered, and a backing disc of sheet material is provided to facilitate installation of the elastomer disc in many instruments.
    Type: Grant
    Filed: May 20, 1976
    Date of Patent: September 19, 1978
    Assignee: The University of Iowa Research Foundation
    Inventor: Edwin Norbeck