Patents by Inventor Akeo Sawayama

Akeo Sawayama 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 recording material
    Patent number: 4795676
    Abstract: In an electrostatic recording material being composed of a multi-layered sheet support having an electroconductive layer and a dielectric layer formed successively thereon, the number of projections having a height of 10 .mu.m or more from the flat surface is limited to a maximum of 50 per 0.1 m.sup.2, so that the material has excellent properties and can produce prints of very high quality.
    Type: Grant
    Filed: December 9, 1986
    Date of Patent: January 3, 1989
    Assignee: Oji Paper Co., Ltd.
    Inventors: Toshio Maekawa, Hiroshige Yamauchi, Takashi Toyota, Akeo Sawayama, Masaaki Yamanaka