Patents by Inventor Yasuji Takami

Yasuji Takami 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).

  • Method for manufacturing fluorescent screens for use in colour picture tubes
    Patent number: 3936302
    Abstract: A fluorescent screen including a plurality of parallel stripes of three colour phosphors is prepared by projecting light from a linear light source positioned in parallel with the stripes on photosensitive substances coated on the inner surface of the panel through a plurality of stripe shaped perforations of a colour selecting member, each divided into a plurality of slit shaped sections by means of bridges. The linear light source is constituted by reciprocating a point light source in parallel with the stripe shaped perforations.
    Type: Grant
    Filed: February 7, 1973
    Date of Patent: February 3, 1976
    Assignee: Hitachi, Ltd.
    Inventors: Yasuji Takami, Kenji Fukuda, Eiichi Yamazaki