Patents by Inventor Yoshifumi Asakawa

Yoshifumi Asakawa 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: D273381
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: April 10, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Takeshi Abe, Masato Shibayama, Yoshifumi Asakawa, Seiji Kinoshita
  • Telephone
    Patent number: D273784
    Type: Grant
    Filed: January 28, 1982
    Date of Patent: May 8, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Masato Shibayama, Takeshi Abe, Yoshifumi Asakawa, Seiji Kinoshita, Kazuhisa Ogawa
  • Telephone
    Patent number: D283509
    Type: Grant
    Filed: August 18, 1983
    Date of Patent: April 22, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Masato Shibayama, Takeshi Abe, Yoshifumi Asakawa, Seiji Kinoshita, Kazuhisa Ogawa