Patents by Inventor Koushiro Kogure

Koushiro Kogure 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).

  • Speaker system including phase shift such that the composite sound wave decreases on the principal speaker axis
    Patent number: 5828763
    Abstract: A speaker system for reproducing a high fidelity sound field. In one embodiment, the speaker system includes at least two speakers, one of which is coupled with a phase shifter for shifting the phase of an audio signal in mid- and high-frequency ranges. The phase shifter shifts the phase between .+-.120.degree. and .+-.180.degree.. In another embodiment, the speaker system includes three speakers and the phase shifter shifts the phase of the audio signal applied to two of the speakers from that of the audio signal applied to the third speaker which is a tweeter.
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: October 27, 1998
    Assignee: Pioneer Electronic Corporation
    Inventors: Shinji Koyano, Koushiro Kogure, Yuichi Saito
  • Loudspeaker
    Patent number: 5115883
    Abstract: A horn shaped baffle is provided in the front of a loudspeaker. Escape holes are formed in the horn shaped baffle so as to emit sound waves deviated from the axis of the loudspeaker. A sound absorptive panel is provided on the outside of the baffle so as to cover the holes.
    Type: Grant
    Filed: September 7, 1990
    Date of Patent: May 26, 1992
    Assignee: Pioneer Electronic Corporation
    Inventors: Hideaki Morikawa, Yasuo Gan, Koushiro Kogure, Takashi Ooyaba