Patents by Inventor Katsuya Yoshikawa

Katsuya Yoshikawa 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).

  • Loudspeaker
    Patent number: D276912
    Type: Grant
    Filed: May 17, 1982
    Date of Patent: December 25, 1984
    Assignee: Pioneer Electronic Corporation
    Inventor: Katsuya Yoshikawa
  • Loudspeaker
    Patent number: D279183
    Type: Grant
    Filed: May 22, 1984
    Date of Patent: June 11, 1985
    Assignee: Pioneer Electronic Corporation
    Inventor: Katsuya Yoshikawa