Patents by Inventor Seiichi Hayashi

Seiichi Hayashi 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 copying apparatus
    Patent number: 3989364
    Abstract: A sintered body obtained by sintering a mixture of lead monoxide, titanium dioxide, zirconium dioxide and lanthanum oxide under a certain condition, is used as transfer master. The transfer master is subjected to electric polarization in accordance with the original picture to be copied so that a plurality of electrophotographic copies are swiftly produced.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: November 2, 1976
    Assignee: Hitachi, Ltd.
    Inventors: Touhei Kawakami, Kunio Tajima, Seiichi Hayashi