Patents by Inventor Ryuma Takashi

Ryuma Takashi 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).

  • Processed substrate obtained by a process for effecting suppression of electrification
    Patent number: 5589270
    Abstract: Electrification is suppressed with a water-soluble electrification-suppressing film having an electron conductivity and comprising a polymer resin. A high electrification-suppressing effect which is also high in vacuum can be easily obtained by using the electrification-suppressing film with less contamination.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: December 31, 1996
    Assignees: Hitachi, Ltd., Showa Denko K.K.
    Inventors: Fumio Murai, Yasunori Suzuki, Hideki Tomozawa, Ryuma Takashi, Yoshihiro Saida, Yoshiaki Ikenoue
  • Method for suppression of electrification
    Patent number: 5437893
    Abstract: Electrification is suppressed with a water-soluble electrification-suppressing film having an electron conductivity and comprising a polymer resin. A high electrification-suppressing effect which is also high in vacuum can be easily obtained by using the electrification-suppressing film with less contamination.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: August 1, 1995
    Assignees: Hitachi, Ltd, Showa Denko K. K.
    Inventors: Fumio Murai, Yasunori Suzuki, Hideki Tomozawa, Ryuma Takashi, Yoshihiro Saida, Yoshiaki Ikenoue
  • Method for suppression of electrification
    Patent number: 5256454
    Abstract: Electrification is suppressed with a water-soluble electrification-suppressing film having an electron conductivity and comprising a polymer resin. A high electrification-suppressing effect which is also high in vacuum can be easily obtained by using the electrification-suppressing film with less contamination.
    Type: Grant
    Filed: May 30, 1991
    Date of Patent: October 26, 1993
    Assignees: Hitachi, Ltd., Showa Denko K.K. Corporations
    Inventors: Fumio Murai, Yasunori Suzuki, Hideki Tomozawa, Ryuma Takashi, Yoshihiro Saida, Yoshiaki Ikenoue