Patents by Inventor Nao Umemura

Nao Umemura 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: D977571
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: February 7, 2023
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Nao Umemura