Patents by Inventor Keiji Chikuma

Keiji Chikuma 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).

  • Portable radio telephone
    Patent number: D392635
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: March 24, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Keiji Chikuma
  • Portion of an electronic computer
    Patent number: D649964
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: December 6, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Keiji Chikuma, Yuji Hirooka
  • Information guide display device
    Patent number: D401973
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: December 1, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masao Isshiki, Akihiko Konno, Keiji Chikuma, Takaharu Ando, Shinji Watanabe
  • Portable radio telephone
    Patent number: D402652
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: December 15, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Keiji Chikuma
  • Information guide display device
    Patent number: D407755
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: April 6, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masao Isshiki, Akihiko Konno, Keiji Chikuma, Takaharu Ando, Shinji Watanabe
  • Electronic computer
    Patent number: D706767
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: June 10, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yusuke Kawai, Keiji Chikuma
  • Electronic computer
    Patent number: D706769
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: June 10, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yusuke Kawai, Keiji Chikuma