Patents by Inventor Tohru Ichikawa

Tohru Ichikawa 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).

  • Magnetic disc
    Patent number: D277859
    Type: Grant
    Filed: March 29, 1983
    Date of Patent: March 5, 1985
    Assignee: Sony Corporation
    Inventors: Etsuro Saito, Tohru Ichikawa
  • Magnetic disc jacket
    Patent number: D284665
    Type: Grant
    Filed: October 24, 1983
    Date of Patent: July 15, 1986
    Assignee: Sony Corporation
    Inventors: Etsuro Saito, Tsuneo Nemoto, Tohru Ichikawa, Shinichiro Takahashi
  • Tape player
    Patent number: D314762
    Type: Grant
    Filed: October 3, 1988
    Date of Patent: February 19, 1991
    Assignee: Sony Corporation
    Inventors: Masayoshi Tsuchiya, Tohru Ichikawa