Patents by Inventor Shoto Yokoyama

Shoto Yokoyama 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).

  • Mechanical pencil
    Patent number: D724669
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: March 17, 2015
    Assignee: Pentel Kabushiki Kaisha
    Inventors: Hidekazu Nakazawa, Shoto Yokoyama
  • Mechanical pencil
    Patent number: D724670
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: March 17, 2015
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Shoto Yokoyama