Patents by Inventor Katsumasa Yamazaki

Katsumasa Yamazaki 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).

  • Patent number: 4639410
    Abstract: A silver halide color photographic light-sensitive material comprises a support and at least one light-sensitive layer. This layer has a plurality of silver halide emulsion layers substantially identical in color sensitivity, but differing in speed. The light-sensitive layer is comprised substantially of monodispersed silver halide emulsions A and B, each containing silver halide particles of the core/shell-type. The silver halide particle sizes of emulsions B and A have a ratio, when multiplied by 100, of less than 70 and the silver halide particles of emulsion B have a silver iodide content in their core that is not less than 5 mole % smaller than that of the core of the silver halide particles of emulsion A.
    Type: Grant
    Filed: February 1, 1985
    Date of Patent: January 27, 1987
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yoshihara Mochizuki, Sohei Goto, Toshihiko Yagi, Katsumasa Yamazaki, Kenji Michiue