Patents by Inventor Toshio Uji

Toshio Uji 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).

  • Double heterostructure light emitting diode
    Patent number: 4862230
    Abstract: A double heterostructure light emitting diode comprises a p-active layer, and n and p-cladding layers respectively provided on the both sides of the p-active layer. The p-active layer is doped with p-impurity such that the concentration thereof is distributed therein to be higher in a region proximate to the p-n junction between said p-active and n-cladding layers. As a result, a response time is shortened and light output is increased.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: August 29, 1989
    Assignee: NEC Corporation
    Inventor: Toshio Uji
  • Semiconductor laser device equipped with a silicon heat sink
    Patent number: 4092614
    Abstract: A semiconductor laser device in which at least one of the main surfaces of a semiconductor laser crystal body which generates heat during operation is brought into thermal contact with a silicon crystal heat-sink body.
    Type: Grant
    Filed: January 7, 1977
    Date of Patent: May 30, 1978
    Assignee: Nippon Electric Co., Ltd.
    Inventors: Isamu Sakuma, Hiroo Yonezu, Katsuhiko Nishida, Taibun Kamejima, Tonao Yuasa, Masayasu Ueno, Toshio Uji, Yasuo Nannichi, Izuo Hayashi