Patents by Inventor Hisatsune Watanabe

Hisatsune Watanabe 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).

  • Light emitting diode
    Patent number: 4680602
    Abstract: A high output light emitting diode (LED) includes an active layer of GaAsP and a window layer formed of either InGaP or InGaAsP. An LED having this structure has an enhanced optical output, and can be manufactured easily and at low cost.
    Type: Grant
    Filed: September 6, 1984
    Date of Patent: July 14, 1987
    Assignee: NEC Corporation
    Inventors: Hisatsune Watanabe, Akira Usui