Patents by Inventor Katsumi Yashiro

Katsumi Yashiro 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).

  • Backlight for an electronic display
    Patent number: 5040098
    Abstract: A backlight having a reflection plate, a diffusion plate, a transparent light guide plate held between the diffusion plate and the reflection plate and having a reflection and diffusion surface adjacent to the reflection plate and a recessed light emitting surface adjacent to the diffusion plate, so that a space is defined between the recessed light emitting surface and the bottom surface of the diffusion plate adjacent thereto, a holder connected to the diffusion plate to define accommodation spaces between the opposite ends of the transparent light guide plate and the holder, and line light sources located in the accommodation spaces.
    Type: Grant
    Filed: April 11, 1990
    Date of Patent: August 13, 1991
    Assignees: Fujitsu Limited, Fujitsu Kasei Ltd.
    Inventors: Akira Tanaka, Shinpei Nagatani, Masahiro Tomatsu, Kazumasa Kaiwa, Kazuaki Yamagishi, Katsumi Yashiro