Patents by Inventor Katsutoshi Sugihara

Katsutoshi Sugihara 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 enclosures
    Patent number: 4889208
    Abstract: A speaker enclosure assembly is disclosed, which comprises an enclosure provided with a baffle plate, to which a speaker unit is attached, characterized in that the enclosure is provided with a bellows-like sound pressure buffer member.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: December 26, 1989
    Inventor: Katsutoshi Sugihara