Patents by Inventor Genji Ohtake

Genji Ohtake 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).

  • Plastic optical member and light-quantity-controlling member each having a light-diffusing layer on its surface
    Patent number: 5384658
    Abstract: There is provided a plastics optical member having on its surface a light-diffusing layer composed of a layer of micro-joints formed by immersing a plastics material successively in a good solvent and a poor solvent, and a plastics light-quantity-controlling member having on its surface a white pattern composed of the micro-joints. The superiority in light diffuse reflection, transmission and light-quantity-controlling property permit their incorporation into various optical systems such as screens for projection, various displays, light-source-directly-under-an-illumination-surface type light boxes, edge light type light boxes, etc.
    Type: Grant
    Filed: April 27, 1992
    Date of Patent: January 24, 1995
    Assignee: Ohno Research & Development Laboratories Co. Ltd.
    Inventors: Genji Ohtake, Hisao Morohashi, Souichi Hasegawa