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Koutarou Naya

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  • Ebina, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Screw type vacuum pump with introduced inert gas
    • Patent number 4,984,974
    • Issue date Jan 15, 1991
    • Hitachi, Ltd.
    • Koutarou Naya
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Screw vacuum pump unit
    • Patent number 4,767,284
    • Issue date Aug 30, 1988
    • Hitachi, Ltd.
    • Kazuaki Shiinoki
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...