Patents by Inventor Kazumi Aoba

Kazumi Aoba 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 lithographic printing plate
    Patent number: 5932381
    Abstract: The present invention relates to an electrophotographic printing plate having high sensitivity to various light sources, high surface smoothness, high water resistance and excellent printability. An electrophotographic lithographic printing plate according to the present invention comprises:a polyester film base having conductive layers on both surfaces thereof so that a surface resistance is from 0.1 to 10.sup.7 .OMEGA./.quadrature., said both surfaces being electrically communicated at an end thereof; anda layer of an electrophotosensitive material, which contains zinc oxide as a photoconductive material and a binder resin and has surface smoothness of 500 to 3000 seconds, provided on one of the surfaces of said base.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: August 3, 1999
    Assignee: Iwatsu Electric Company, Ltd.
    Inventors: Akio Akao, Kazumi Aoba, Hideyuki Yamamoto