Patents by Inventor Tomimi Yoshizawa

Tomimi Yoshizawa 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).

  • Direct positive silver halide light-sensitive color photographic material
    Patent number: 4925780
    Abstract: A direct positive silver halide light-sensitive color photographic material comprising, on a support, (1) at least three light-sensitive silver halide emulsion layers containing internal latent image-type light-sensitive silver halide grains, (2) specific sensitizing dyes having formulas [I], [II] and [III], respectively defined in the specification, and (3) at least one anti-irradiation compound selected from the group consisting of those compounds having formulas [IV], [V] and [VI], respectively defined in the specification, is disclosed.
    Type: Grant
    Filed: August 18, 1988
    Date of Patent: May 15, 1990
    Assignee: Konica Corporation
    Inventors: Tomimi Yoshizawa, Keiji Ogi, Atushi Kamitakahara