Patents by Inventor Sayoko Hirai

Sayoko Hirai 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).

  • Cutter knife
    Patent number: D430475
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: September 5, 2000
    Assignee: NT Incorporated
    Inventor: Sayoko Hirai