Patents by Inventor Jorgen S. Stokholm

Jorgen S. Stokholm 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).

  • Loudspeaker unit
    Patent number: 4783820
    Abstract: For a good and efficient sound reproduction from a loudspeaker unit it is prescribed that two woofers are arranged back to back, one on a front plate of the unit and the other on an internal partion plate, whereby a front compartment of the unit operates as an effective bass reflection system, while a closed rear compartment contributes, via the rear loudspeaker, to improve the quality of the reproduced sound. The back to back arrangement of the two loudspeakers results in a non-vibrating unit.
    Type: Grant
    Filed: March 24, 1987
    Date of Patent: November 8, 1988
    Inventors: Johan P. Lyngdorf, Jorgen S. Stokholm