Patents by Inventor Norbert Walliser

Norbert Walliser 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).

  • Rotary resistors
    Patent number: 4491823
    Abstract: A rotary resistor or rheostat used in hearing aids worn behind the ear. Such an application necessitates a small, compact arrangement. The arrangement is provided with a supporting surface acting as a substrate with the prerequisite conductors or resistances applied to the support surface.
    Type: Grant
    Filed: November 1, 1982
    Date of Patent: January 1, 1985
    Assignee: Siegert GmbH Company
    Inventors: Michael J. Bergmann, Armin Lederer, Norbert Walliser