Patents by Inventor Kazuhiko Masui

Kazuhiko Masui 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).

  • Controller for acoustic apparatus
    Patent number: 5165097
    Abstract: A surround system comprising front, center, and rear amplifiers which respectively drive front, center and rear speaker units. The system operates in a surround sound environment with low impedance (4.OMEGA.) speaker units. When high impedance speaker units are connected, the system automatically cuts the center and rear speaker units and operates in a non-surround sound environment by the front amplifier only. Accordingly, the system does not require a excessive large power supply unit.
    Type: Grant
    Filed: August 23, 1991
    Date of Patent: November 17, 1992
    Assignee: Kabushiki Kaisha Kenwood
    Inventors: Kiyoshi Morishima, Kazuhiko Masui, Toyohisa Shibasaki