Patents by Inventor Masaki Shibazaki

Masaki Shibazaki 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).

  • Coloring fluid-containing marking device made of biodegradable plastic resin
    Patent number: 5700534
    Abstract: A coloring fluid-containing marking device which sufficiently withstand practical use and, after use, its molded members can be biologically degraded in soil. The marking device comprises a coloring fluid container molded from an aliphatic polyester resin, and a coloring fluid containing a solvent mainly comprising an aliphatic hydrocarbon and/or an alicyclic hydrocarbon.
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: December 23, 1997
    Assignee: The Pilot Ink Co., Ltd.
    Inventors: Masaki Shibazaki, Mikiya Ido, Tohru Watanabe