Patents by Inventor Yasutcki Kamezawa

Yasutcki Kamezawa 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).

  • Process for diazo-type multicolor reproduction
    Patent number: 3948661
    Abstract: A process for diazo-type multi-color reproduction by which portions of a sensitive paper corresponding to predetermined portions of an original can be colored selectively to different hues by disposing a layer of thermotransferable coupler between an original and diazophotosensitive paper followed by exposure to light and heating of the assembly. The layer of thermotransferable coupler is not applied to the entire image area of the original and the thermotransferable coupler is faster in coupling rate with the diazonium salt under the development conditions than the basic color coupler of the photosensitive paper or developing solution.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: April 6, 1976
    Assignee: Mita Industrial Company Ltd.
    Inventors: Kouzi Nihyakumen, Taizo Yokoyama, Yasuo Ueda, Yasutcki Kamezawa, Tatsuo Aizawa