Patents by Inventor Ryoji Matsuo

Ryoji Matsuo 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).

  • Frame for speaker device and speaker device
    Patent number: 7720248
    Abstract: A frame for a speaker device includes a magnetic circuit housing unit which houses a magnetic circuit, an annular outer peripheral portion which is arranged on an outer side of the magnetic circuit housing unit, and plural arm portions which connect the magnetic circuit housing unit and the outer peripheral portion. The plural arm portions form such plural bridges that a pair of the arm portions are linearly positioned to connect two parts of the outer peripheral portion, and each of the bridges does not pass through a center of the outer peripheral portion.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: May 18, 2010
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation, Honda Motor Co., Ltd.
    Inventors: Hiromitsu Sasaki, Yutaka Moriyama, Eiji Sakaguchi, Hidehito Oki, Tsutomu Harano, Masaki Soda, Nobuo Aizawa, Ryoji Matsuo
  • Frame for speaker device and speaker device
    Publication number: 20060198546
    Abstract: A frame for a speaker device includes a magnetic circuit housing unit which houses a magnetic circuit, an annular outer peripheral portion which is arranged on an outer side of the magnetic circuit housing unit, and plural arm portions which connect the magnetic circuit housing unit and the outer peripheral portion. The plural arm portions form such plural bridges that a pair of the arm portions are linearly positioned to connect two parts of the outer peripheral portion, and each of the bridges does not pass through a center of the outer peripheral portion.
    Type: Application
    Filed: February 17, 2006
    Publication date: September 7, 2006
    Inventors: Hiromitsu Sasaki, Yutaka Moriyama, Eiji Sakaguchi, Hidehito Oki, Tsutomu Harano, Masaki Soda, Nobuo Aizawa, Ryoji Matsuo