Patents by Inventor Kokichi Ishibutsu

Kokichi Ishibutsu 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).

  • Patent number: 4977050
    Abstract: The present invention relates to an electrophotographic sensitive member, in particular to an electrophotographic sensitive member capable of enhancing a photosensitivity on both a short wavelength side and a long wavelength side and a charge acceptance and thus suitable for a plain paper copying machine (PPC).The stabilized operation characteristics and durability have been required for an electrophotographic sensitive member drum carried on instruments such as high-speed copying machine and laser beam printer.Amorphous silicon has been watched with interest for this requirement in view of superior abrasion resistance, heat resistance, antipollution property, photosensitivity characteristic and the like.However, such the amorphous silicon photosensitive member shows the higher photosensitivity on the long wavelength side.
    Type: Grant
    Filed: December 21, 1988
    Date of Patent: December 11, 1990
    Assignee: Kyocera Corporation
    Inventors: Takao Kawamura, Naooki Miyamoto, Hiroshi Ito, Hitoshi Takemura, Kokichi Ishibutsu