Patents by Inventor Noboru Keitoku

Noboru Keitoku 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).

  • Remote-control-light detecting device for AV apparatus
    Patent number: 5036188
    Abstract: A remote-control-light detecting device includes a light-receiving lens which is fitted in a front panel of an AV apparatus and has a wide-angle lens surface. Examples of the wide-angle lens surface are a spherical surface and a pyramidal surface.
    Type: Grant
    Filed: March 16, 1990
    Date of Patent: July 30, 1991
    Assignee: Pioneer Electronic Corporation
    Inventor: Noboru Keitoku
  • Tuner
    Patent number: D266508
    Type: Grant
    Filed: July 29, 1980
    Date of Patent: October 12, 1982
    Assignee: Pioneer Kabushiki Kaisha
    Inventors: Jun-Ichi Yamamoto, Toshihito Nomura, Noboru Keitoku
  • Amplifier
    Patent number: D266511
    Type: Grant
    Filed: July 29, 1980
    Date of Patent: October 12, 1982
    Assignee: Pioneer Kabushiki Kaisha
    Inventors: Jun-Ichi Yamamoto, Noboru Keitoku
  • Video disc player
    Patent number: D290000
    Type: Grant
    Filed: October 2, 1984
    Date of Patent: May 26, 1987
    Assignee: Pioneer Electronic Corporation
    Inventors: Juichi Yamamoto, Kazuhiko Kawano, Toru Tsunetsugu, Shuji Natori, Noboru Keitoku
  • Loudspeaker
    Patent number: D291080
    Type: Grant
    Filed: November 16, 1984
    Date of Patent: July 28, 1987
    Assignee: Pioneer Electronic Corporation
    Inventors: Noboru Keitoku, Akira Katsuno
  • Speaker
    Patent number: D292091
    Type: Grant
    Filed: May 15, 1985
    Date of Patent: September 29, 1987
    Assignee: Pioneer Electronic Corporation
    Inventor: Noboru Keitoku
  • Speaker
    Patent number: D295741
    Type: Grant
    Filed: July 8, 1985
    Date of Patent: May 17, 1988
    Assignee: Pioneer Electronic Corporation
    Inventor: Noboru Keitoku