Patents by Inventor Fukushima Hisao

Fukushima Hisao 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 set
    Patent number: D252752
    Type: Grant
    Filed: August 4, 1977
    Date of Patent: August 28, 1979
    Assignee: Oki Electric Co., Ltd.
    Inventors: Fukushima Hisao, Watanabe Katsuhito, Kanda Yoshinori, Watanabe Tsutomu