Patents by Inventor Hitoshi Touma

Hitoshi Touma 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).

  • Electrostatic image holder having insulating overlayer of fluorinated surfactant
    Patent number: 4423132
    Abstract: An image-holding member for holding electrostatic images and/or toner images comprising an insulating layer on the surface, the insulating layer being composed mainly of a fluorine-containing surface active agent, a lubricant and a resin.
    Type: Grant
    Filed: October 20, 1980
    Date of Patent: December 27, 1983
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideyo Kondo, Hitoshi Touma
  • Developer for developing electrostatic latent images
    Patent number: 4141849
    Abstract: Graphite fluoride is added to a developer for developing electrostatic latent images.
    Type: Grant
    Filed: February 22, 1977
    Date of Patent: February 27, 1979
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuo Hasegawa, Hitoshi Touma, Kunio Satomi, Tatsuo Miyamae