Patents by Inventor Seiji Onuma

Seiji Onuma 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).

  • Digital multi-meter
    Patent number: D435796
    Type: Grant
    Filed: February 8, 2000
    Date of Patent: January 2, 2001
    Assignee: Hioki Denki Kabushiki Kaisha
    Inventors: Hideki Tomiyama, Seiji Onuma
  • Digital multi-meter
    Patent number: D481963
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: November 11, 2003
    Assignee: Hioki Denki Kabushiki Kaisha
    Inventors: Seiji Onuma, Hideki Tomiyama
  • Digital multi-meter
    Patent number: D381280
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: July 22, 1997
    Assignee: Hioki Denki Kabushiki Kaisha
    Inventors: Hideki Tomiyama, Seiji Onuma
  • Digital multi-meter
    Patent number: D390139
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: February 3, 1998
    Assignee: Hioki Denki Kabushiki Kaisha
    Inventors: Hideki Tomiyama, Seiji Onuma
  • Insulation resistance tester
    Patent number: D395834
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: July 7, 1998
    Assignee: Hioki Denki Kabushiki Kaisha
    Inventors: Junji Kumai, Seiji Onuma
  • Insulation resistance tester
    Patent number: D700085
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: February 25, 2014
    Assignee: Hioki Denki Kabushiki Kaisha
    Inventors: Tetsuya Yoshiike, Seiji Onuma
  • Digital multi meter
    Patent number: D704579
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: May 13, 2014
    Assignee: Hioki E.E. Corporation
    Inventors: Toshio Heishi, Seiji Onuma
  • Digital multi meter
    Patent number: D705099
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: May 20, 2014
    Assignee: Hioki E.E. Corporation
    Inventors: Toshio Heishi, Seiji Onuma
  • Digital multi meter
    Patent number: D705681
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: May 27, 2014
    Assignee: Hioki E.E. Corporation
    Inventors: Kouji Morishita, Seiji Onuma
  • Clamp meter
    Patent number: D789814
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: June 20, 2017
    Assignee: HIOKI E.E. CORPORATION
    Inventors: Hikaru Kodama, Tetsuya Yoshiike, Takeaki Ohsawa, Seiji Onuma