Patents by Inventor Shoichi Kohya

Shoichi Kohya 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).

  • Density filter, method of forming the density filter and apparatus thereof
    Publication number: 20080316628
    Abstract: A film coating method enables, when forming film layers in response to optical characteristics on a substrate, to coat gradation range layers of decreasing thickness without distributions, and to coat films on a plurality of substrates at the same time. The gradation range layer is formed by sputtering evaporation targets of dielectric substances with an introduction gas, followed by forming the films with compounds generated by applying a reactive gas to the films.
    Type: Application
    Filed: June 23, 2008
    Publication date: December 25, 2008
    Applicant: NISCA CORPORATION
    Inventors: Katsura Nakajima, Shoichi Kohya