Patents by Inventor Yasuko Yajima

Yasuko Yajima 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 apparatus with speakerphone and display panel
    Patent number: D299134
    Type: Grant
    Filed: January 22, 1987
    Date of Patent: December 27, 1988
    Assignee: Meisei Electric Co., Ltd.
    Inventors: Shigeaki Kido, Sadao Isozaki, Yasuko Yajima
  • Direct station telephone selector stand
    Patent number: D300029
    Type: Grant
    Filed: January 22, 1987
    Date of Patent: February 28, 1989
    Assignee: Meisei Electric Co., Ltd.
    Inventors: Shigeaki Kido, Sadao Isozaki, Yasuko Yajima
  • Direct station telephone selector
    Patent number: D303801
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: October 3, 1989
    Assignee: Meisei Electric Co., Ltd.
    Inventors: Shigeaki Kido, Sadao Isozaki, Yasuko Yajima
  • Attendant telephone switchboard
    Patent number: D304564
    Type: Grant
    Filed: May 19, 1987
    Date of Patent: November 14, 1989
    Assignee: Meisei Electric Co., Ltd.
    Inventors: Shigeaki Kido, Sadao Isozaki, Yasuko Yajima
  • Telephone
    Patent number: D310076
    Type: Grant
    Filed: March 12, 1987
    Date of Patent: August 21, 1990
    Assignee: Meisei Electric Co., Ltd.
    Inventors: Shigeaki Kido, Sadao Isozaki, Yasuko Yajima