Patents by Inventor Manabu Tohyama

Manabu Tohyama 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).

  • Viscous coupling fluids
    Patent number: 5374363
    Abstract: The shortcomings inherent in prior art coupling fluids are eliminated by combining 1) a polyorganosiloxane fluid as the base oil with 2) sulfur or certain sulfur compounds and 3) at least one cyclic organosiloxane. These three ingredients form a suitable coupling fluid for use in viscous coupling systems.
    Type: Grant
    Filed: November 17, 1993
    Date of Patent: December 20, 1994
    Assignees: Dow Corning Asia, Ltd., Vicodrive Japan, Ltd., Cosmo Oil Co, Ltd.
    Inventors: Masahiko Fukuda, Teiji Masuda, Kenichi Sekine, Manabu Tohyama, Norio Yano, Yukio Yuhashi