Patents by Inventor Rudiger Fleischer

Rudiger Fleischer 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: 5293009
    Abstract: A conical loudspeaker (10) has a dust protection cap (23) of hot-pressed polymer foam. Dust protection caps (23) made from this material are largely insensitive to finger pressure and can be attached to the conical speaker membrane using simple adhesives. Preferably the outer rim of the conical speaker membrane is secured by a lock beading (14) made from the same foam as the dust protection cap (23). This has the advantage that if the pressing die is suitably configured, the dust protection cap (23) can be made from the portion of the foam mat that otherwise, if only a lock beading (14) was being produced, would be left over in the center of the foam mat.
    Type: Grant
    Filed: May 20, 1992
    Date of Patent: March 8, 1994
    Assignee: Nokia (Unterhaltungselektronik/(Deutschland) GmbH
    Inventor: Rudiger Fleischer
  • Patent number: 5287412
    Abstract: A sub-woofer arrangement for the reproduction of bass tones is provided in an armrest of a seat of a passenger car. The sub-woofer arrangement has a sound outlet orifice positioned so as to face a dashboard when lowered in a first position and be unobstructed when raised into a second position in a recess within the seat.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: February 15, 1994
    Assignee: Nokia (Deutschland) GmbH
    Inventors: Hubert Etzel, Jorg Prokisch, Rudiger Fleischer, Edgar Kirk