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Ikuo Yokoyama

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  • Nobeoka, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Non-stagnant piping system
    • Patent number 5,476,118
    • Issue date Dec 19, 1995
    • Asahi Yukizai Kogyo Co., Ltd.
    • Ikuo Yokoyama
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Control valve
    • Patent number 5,312,085
    • Issue date May 17, 1994
    • Asahi Yukizai Kogyo Co., Ltd.
    • Ikuo Yokoyama
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    Ball valve
    • Patent number 5,181,539
    • Issue date Jan 26, 1993
    • Asahi Yukizai Kogyo Co., Ltd.
    • Ikuo Yokoyama
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Constant flow valve
    • Patent number 5,174,332
    • Issue date Dec 29, 1992
    • Asahi Yukizai Kogyo Co., Ltd.
    • Ikuo Yokoyama
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    Constant flow valve
    • Patent number 4,791,956
    • Issue date Dec 20, 1988
    • Asahi Yukizai Kogyo Co., Ltd.
    • Naoya Kominami
    • G05 - CONTROLLING REGULATING