Patents by Inventor Akira Tukada

Akira Tukada 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).

  • Image-forming photosensitive composition
    Patent number: 4465761
    Abstract: An image-forming photosensitive composition comprises:(a) an organohalogen compound capable of forming a free radical by the irradiation with light,(b) a substantially colorless dye which colors when it is contacted with an acidic substance,(c) an aromatic amine and/or conjugated nitrogen-containing heterocyclic compound,(d) a binder, and(e) an aliphatic amine and/or alicyclic amine.
    Type: Grant
    Filed: February 23, 1982
    Date of Patent: August 14, 1984
    Assignees: Oriental Photo Industries Co., Ltd., Hodogaya Chemical Co., Ltd.
    Inventors: Yukio Takegawa, Akira Tukada, Susumu Suzuka, Nobuyoshi Endo
  • Facsimile
    Patent number: D331924
    Type: Grant
    Filed: December 4, 1991
    Date of Patent: December 22, 1992
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masaji Sawada, Akira Tukada, Kenzo Yoshida, Takeshi Kodera