Patents by Inventor Isamu Hirasawa

Isamu Hirasawa 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).

  • Telephone
    Patent number: D245843
    Type: Grant
    Filed: December 7, 1976
    Date of Patent: September 20, 1977
    Assignee: Kanda Tsushin Kogyo Co., Ltd.
    Inventors: Isamu Hirasawa, Minoru Sasai, Kunio Ito
  • Telephone
    Patent number: D248300
    Type: Grant
    Filed: February 9, 1977
    Date of Patent: June 27, 1978
    Assignee: Kanda Tsushin Kogyo Co., Ltd.
    Inventors: Isamu Hirasawa, Hirokazu Mokudai, Osamu Kato