Patents by Inventor Reiko Takeishi

Reiko Takeishi 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).

  • II/VI-compound semiconductor light emitting device
    Patent number: 5567960
    Abstract: A lifetime of a II/VI-compound semiconductor light emitting device can be extended. The II/VI-compound semiconductor light emitting device includes an active layer (4) and a p-side cladding layer (6). An active-layer side portion (26) of the p-side cladding layer (6) is formed as a lightly impurity-doped region or a non-doped region.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: October 22, 1996
    Assignee: Sony Corporation
    Inventors: Akira Ishibashi, Satoshi Ito, Hiroyuki Okuyama, Kazushi Nakano, Kenji Kondo, Reiko Takeishi