Patents by Inventor Koushirou Kogure

Koushirou 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
    Patent number: 5590208
    Abstract: A duct is provided in a cabinet for radiating sound pressure emitted from a speaker unit. The duct comprises a first duct and a second duct. The first duct extends in a direction perpendicular to a radiating direction of the sound pressure radiated from a front side of the speaker unit. The second duct is connected to an end of the first duct. An inner end of of the second duct is communicated with the cabinet. The speaker unit is disposed at a connection of the first and second ducts.
    Type: Grant
    Filed: April 11, 1995
    Date of Patent: December 31, 1996
    Assignee: Pioneer Electronic Corporation
    Inventors: Shinji Koyano, Koushirou Kogure, Takashi Ohyaba, Makoto Sakakibara, Katsutoki Hanayama