Patents by Inventor Masahiro Tsutsumi

Masahiro Tsutsumi 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).

  • Electrophotographic method using amorphous silicon photosensitive material
    Patent number: 5547805
    Abstract: More than 100,000 pieces of copy are obtained, in an electrophotographic process using an amorphous silicon photosensitive material, by maintaining the atmosphere for the photosensitive material and effecting the developing and polishing of the surface of the photosensitive material in a manner such that X, the degree of surface oxidation of the amorphous silicon photosensitive material (SiO/SiC), and Y, the amount of deposition of discharge products (mol/cm.sup.2), satisfy the relationships (1) and (2);0.4.ltoreq.x.ltoreq.1.25 (1)Y.ltoreq.2.2.times.10.sup.-9.exp(-2.0 x) (2)By this method, image flow is prevented without permitting the life of the photosensitive material to decrease, and an image can be stably formed for extended periods of time.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: August 20, 1996
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Hiroyuki Hazama, Masahiro Tsutsumi, Masaru Watanabe
  • Photosensitive composition for electrophotography having polyvinyl carbazole and silicone oil
    Patent number: 4574114
    Abstract: A photosensitive composition for electrophotography comprising polyvinyl carbazole, a charge-generating organic pigment, and as a sensitizing agent a silicone oil, thereby enhancing the sensitivity of the resulting photosensitive layer and improving the aging characteristic thereof.
    Type: Grant
    Filed: November 16, 1983
    Date of Patent: March 4, 1986
    Assignee: Mita Industrial Company, Ltd.
    Inventors: Masahiro Tsutsumi, Toru Nakazawa, Yasuharu Utsunomiya
  • Excavating vehicle
    Patent number: 4552503
    Abstract: An excavating vehicle according to the present invention comprises an excavating apparatus rotated by a hydraulic actuator, said excavating apparatus being stopped automatically and smoothly at predetermined positions with a simple operation.
    Type: Grant
    Filed: December 21, 1983
    Date of Patent: November 12, 1985
    Assignee: Kubota, Ltd.
    Inventors: Akihiko Mouri, Yoshinobu Tabuchi, Akira Tsuda, Masahiro Tsutsumi, Kazushige Ikeda