Patents by Inventor Shigeki Maruyama

Shigeki Maruyama 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: D421772
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: March 21, 2000
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Shigeki Maruyama