Patents by Inventor Yokoyama Hiroko

Yokoyama Hiroko 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).

  • Portable radio telephone
    Patent number: D451897
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: December 11, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yokoyama Hiroko