Patents by Inventor Yoshistomo Tanaka

Yoshistomo Tanaka 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).

  • Porous resin stamp and a producing method thereof
    Publication number: 20020066980
    Abstract: The present invention aims to provide a porous resin stamp, which can repeatedly seal without supplying ink for a long period of time by beforehand soaking ink therein, and a producing method thereof.
    Type: Application
    Filed: January 16, 2001
    Publication date: June 6, 2002
    Inventors: Shigeru Kitahara, Yasuo Nagasawa, Yuji Tanaka, Yoshistomo Tanaka