Patents by Inventor Shinkichi Katayama

Shinkichi Katayama 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).

  • Ball point pen
    Patent number: D351416
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: October 11, 1994
    Assignee: Pentel Kabushiki Kaisha
    Inventors: Shigeo Oka, Shinkichi Katayama