Patents by Inventor Seishiro Iwamura

Seishiro Iwamura 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).

  • Reflection type screen
    Patent number: 4298246
    Abstract: A reflection type screen is made of a transparent substrate which has many convex lenses on the front surface and many mirror planes and black planes on the rear surface. Each lens has a focal length so as to form a focus behind the rear surface as a reflective plane. A part of incident rays is reflected on the mirror planes and the other part of the incident rays is absorbed into the black planes.
    Type: Grant
    Filed: November 7, 1979
    Date of Patent: November 3, 1981
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Seishiro Iwamura