Patents by Inventor Keiko Takemata

Keiko Takemata 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).

  • Desk-top electronic calculator
    Patent number: D298545
    Type: Grant
    Filed: April 15, 1986
    Date of Patent: November 15, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Eiichi Yoshioka, Keiko Takemata, Akihiko Kobayashi, Takeshi Hasegawa, Shigeki Mori
  • Desk-top electronic calculator
    Patent number: D298546
    Type: Grant
    Filed: April 15, 1986
    Date of Patent: November 15, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Eiichi Yoshioka, Keiko Takemata, Akihiko Kobayashi, Takeshi Hasegawa
  • Desk-top electronic calculator
    Patent number: D298547
    Type: Grant
    Filed: April 15, 1986
    Date of Patent: November 15, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Eiichi Yoshioka, Keiko Takemata, Akihiko Kobayashi, Yasuhide Saito
  • Desk-top electronic calculator
    Patent number: D298548
    Type: Grant
    Filed: April 15, 1986
    Date of Patent: November 15, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Eiichi Yoshioka, Keiko Takemata, Akihiko Kobayashi, Yasuhide Saito
  • Hand held electronic dialer
    Patent number: D301885
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: June 27, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiko Takemata, Osamu Murakami
  • Dest-top electronic calculator
    Patent number: D303981
    Type: Grant
    Filed: September 9, 1986
    Date of Patent: October 10, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiko Takemata, Eiichi Yoshioka