Patents by Inventor Kenshiro Sumi

Kenshiro Sumi 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).

  • Translucent projection screen for rear-type image projection system and process for fabricating the same
    Patent number: 4361382
    Abstract: A translucent projection screen for a rear-type image projection system comprising a flat plate or sheet of transparent resin into which are uniformly dispersed or distributed spherical glass beads, which are light diffusing materials. Such screen as described above is fabricated by dispersing or distributing spherical glass beads into a transparent resin, extruding and cutting the resin into pellets and forming these pellets into a flat plate or sheet by compression molding. A translucent projection screen having a Fresnel lens surface and a lenticular lens surface can be also molded by one step.
    Type: Grant
    Filed: January 22, 1981
    Date of Patent: November 30, 1982
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Keisuke Miyoshi, Kenshiro Sumi