Patents by Inventor Jurgen Ehmann

Jurgen Ehmann 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).

  • Patent number: 5162619
    Abstract: A membrane for a loudspeaker is designed so as to facilitate manufacture and to improve the tone of the loudspeaker. The membrane consists of a first plastic film (5a) which serves to retain the shape and a second plastic film (56) laminated to the first film which serves to damper partial oscillations. The membrane is particularly suitable as a conical membrane for a loudspeaker for a television receiver.
    Type: Grant
    Filed: January 3, 1990
    Date of Patent: November 10, 1992
    Assignee: EWD Electronic-Werke Deutschland GmbH
    Inventors: Karl-Heinz Thiele, Jurgen Ehmann, Klaus Harbarth