Patents by Inventor Kazutoshi Kimizuka

Kazutoshi Kimizuka 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).

  • Lightsafe masking film
    Patent number: 4925713
    Abstract: A lightsafe masking film for use in masking a roomlight film is disclosed which comprises a substrate, and a transparent, lightsafe layer peelably provided over the surface of the substrate and containing a combination of specific yellow and blue colorants so that the lightsafe layer is green or light green in color but can effectively block light to which the roomlight film is sensitive.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: May 15, 1990
    Assignee: Somar Corporation
    Inventors: Naohiko Kiryu, Kazutoshi Kimizuka, Etsuko Minezaki, Hiroshi Maruyama