Patents by Inventor Ikuo Oto

Ikuo Oto 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).

  • Liquid developer for electrostatic photography
    Patent number: 4886730
    Abstract: A life of a starting liquid developer for electrostatic photography is prolonged by using a supplemental developer that returns an electrically charged state of the developer varied by repeated use of the developer to an original or appropriate state of the electrical charge for electrostatic photography.
    Type: Grant
    Filed: July 11, 1988
    Date of Patent: December 12, 1989
    Assignee: Iwatsu Electric Co., Ltd.
    Inventors: Ikuo Oto, Hayato Hyakutake, Ryo Kobirumaki