Patents by Inventor Richard L. Rothenberg

Richard L. Rothenberg 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).

  • Vented loudspeaker
    Patent number: 4785908
    Abstract: A vented louspeaker has a speaker and a vent tube within the loudspeaker enclosure, the vent tube being arranged obliquely to the wall on which it is mounted and being longer than the distance between that wall and the opposite wall.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: November 22, 1988
    Inventor: Richard L. Rothenberg