Patents by Inventor Toshiharu Ohyabu

Toshiharu Ohyabu 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).

  • Felt pen
    Patent number: D275297
    Type: Grant
    Filed: December 15, 1981
    Date of Patent: August 28, 1984
    Assignee: Shachihata Industrial Co., Ltd.
    Inventor: Toshiharu Ohyabu
  • Marking pen
    Patent number: D282378
    Type: Grant
    Filed: October 5, 1983
    Date of Patent: January 28, 1986
    Assignee: Shachihata Industry Co., Ltd.
    Inventors: Toshiharu Ohyabu, Masayuki Hasegawa