Patents by Inventor Gerard Hendrik Joseph De Vries

Gerard Hendrik Joseph De Vries 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 system with controlled directional sensitivity
    Patent number: 6128395
    Abstract: Loudspeaker system having various loudspeakers (SP.sub.i, i=0, 1, 2, . . . , m) which are arranged in accordance with a predetermined pattern and have associated filters (F.sub.i, i=0, 1, 2, . . . , m), which filters all receive an audio signal (AS) and are equipped to transmit output signals to the respective loudspeakers (SP.sub.i) such that they, during operation, generate a sound pattern of a predetermined form, wherein the loudspeakers (SP.sub.i) have a mutual spacing (l.sub.i), which, insofar as physically possible, substantially corresponds to a logarithmic distribution, wherein the minimum spacing is determined by the physical dimensions of the loudspeakers used.
    Type: Grant
    Filed: May 7, 1997
    Date of Patent: October 3, 2000
    Assignee: Duran B.V.
    Inventor: Gerard Hendrik Joseph De Vries