Patents by Inventor Hitoshi Tohma

Hitoshi Tohma 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).

  • Photosensitive member for electrophotography
    Patent number: 4877701
    Abstract: A photosensitive member for electrophotography which is excellent in successive copying characteristics as well as mechanical durability is provided. The photosensitive member comprises a photosensitive layer, at least the surface portion of which comprises a lubricant, and a charge-transporting substance having an oxidation potential of 0.6 volt or above.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: October 31, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaaki Hiro, Tomohiro Kimura, Hisami Tanaka, Noboru Kashimura, Shigemori Tanaka, Hitoshi Tohma, Masafumi Hisamura
  • Cleaning device
    Patent number: 4465362
    Abstract: A cleaning device for removing any residual on an image bearing member has a cleaning member held in pressure contact with the surface of the image bearing member, and means for detecting the pressure contact condition of the cleaning member.
    Type: Grant
    Filed: December 23, 1981
    Date of Patent: August 14, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hitoshi Tohma, Tomohiro Kimura, Hiroshi Ito