Patents by Inventor Osam Kanehisa

Osam Kanehisa 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).

  • Semiconductor optical apparatus
    Patent number: 5010517
    Abstract: A semiconductor optical apparatus of the invention has a quantum well super-lattice structure essentially of only direct transition semiconductor or comprising a direct transition semiconductor and an indirect transiton semiconductor. In the semiconductor optical apparatus of the invention, by using an absorption saturation phenomenon of excitions in the direct transition semiconductor constructing the quantum well super-lattice structure, a non-volatile information recording apparatus which can record, reproduce, and erase information at a high speed even at the room temperature or even by irradiating a light of a low intensity is realized.
    Type: Grant
    Filed: November 16, 1988
    Date of Patent: April 23, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Masahito Migita, Tsuyoshi Uda, Osam Kanehisa, Masatoshi Shiiki
  • 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