TREA

Isamu Sakuma

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Semiconductor laser apparatus with isolator
    • Patent number 4,686,678
    • Issue date Aug 11, 1987
    • NEC Corporation
    • Yoshinori Ohta
    • G02 - OPTICS
  • Information Patent Grant

    Buried-type semiconductor laser
    • Patent number 4,644,551
    • Issue date Feb 17, 1987
    • NEC Corporation
    • Hidoe Kawano
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Semiconductor laser
    • Patent number 4,434,491
    • Issue date Feb 28, 1984
    • Nippon Electric Co., Ltd.
    • Isamu Sakuma
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Semiconductor laser
    • Patent number 4,321,556
    • Issue date Mar 23, 1982
    • Nippon Electric Co., Ltd.
    • Isamu Sakuma
    • H01 - BASIC ELECTRIC ELEMENTS