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Koiwa; Yoshinobu

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  • Chiba, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pump and valve apparatus
    • Patent number 5,035,261
    • Issue date Jul 30, 1991
    • Koiwa; Yoshinobu
    • Yoshinobu Koiwa
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Shaft construction method
    • Patent number 5,026,216
    • Issue date Jun 25, 1991
    • Koiwa; Yoshinobu
    • Yoshinobu Koiwa
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Pump and valve apparatus
    • Patent number 4,948,349
    • Issue date Aug 14, 1990
    • Koiwa; Yoshinobu
    • Yoshinobu Koiwa
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

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