TREA

Yoshitsugu Tsutsumi

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  • Nogi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Vacuum pump
    • Patent number RE33129
    • Issue date Dec 12, 1989
    • Hitachi, Ltd.
    • Mashiro Mase
    • 415 - Rotary kinetic fluid motors or pumps
  • Information Patent Grant

    Vacuum pump
    • Patent number 4,668,160
    • Issue date May 26, 1987
    • Hitachi, Ltd.
    • Masahiro Mase
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...