Patents by Inventor Masatoshi Shiiki

Masatoshi Shiiki 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).

  • Electroluminescent display apparatus having a multi-color illuminant layer and process for producing the same
    Patent number: 4862033
    Abstract: A multi-color single layer electroluminescent display apparatus comprising a illuminant layer having been interposed between a pair of electrode layers and having a plurality of activators doped at spatially different locations is disclosed. A process for producing an electroluminescent display apparatus comprising doping with a plurality of activators at spatially different locations on forming a illuminant layer is also disclosed.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: August 29, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Masahito Migita, Osam Kanehisa, Masatoshi Shiiki, Hajime Yamamoto