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Hiroki Oka

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  • Yamanashi-ken, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Gate valve for semiconductor processing system
    • Patent number 6,488,262
    • Issue date Dec 3, 2002
    • Tokyo Electron Limited
    • Hiroki Oka
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Gate valve
    • Patent number 6,092,786
    • Issue date Jul 25, 2000
    • Tokyo Electron Limited
    • Hiroki Oka
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...