Patents by Inventor Toji Kikuchi

Toji Kikuchi 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).

  • Transmission type projection screen
    Patent number: 6411436
    Abstract: A transmission type projection screen includes a diffusion layer on which projection light is focused, and a neutral gray layer positioned behind the diffusion layer on a rear side of the diffusion layer at which the projection light enters. The optical density of the neutral gray layer is in the range of 0.05 to 0.7.
    Type: Grant
    Filed: July 27, 2000
    Date of Patent: June 25, 2002
    Assignee: Kikuchi Science Laboratory Inc.
    Inventor: Toji Kikuchi