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Takashi Nagaoka

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Patents Grantslast 30 patents

  • Information Patent Grant

    Turbo vacuum pump with a magnetically levitated rotor and a control...
    • Patent number 5,961,291
    • Issue date Oct 5, 1999
    • Hitachi, Ltd.
    • Seiji Sakagami
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 5,664,935
    • Issue date Sep 9, 1997
    • Hitachi, Ltd.
    • Akira Nishiuchi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Turbo vacuum pump
    • Patent number 5,536,148
    • Issue date Jul 16, 1996
    • Hitachi, Ltd.
    • Akira Nishiuchi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Turbo vacuum pump
    • Patent number 5,501,583
    • Issue date Mar 26, 1996
    • Hitachi, Ltd.
    • Takashi Nagaoka
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Turbo vacuum pump
    • Patent number 5,451,147
    • Issue date Sep 19, 1995
    • Hitachi, Ltd.
    • Seiji Sakagami
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Turbo vacuum pump
    • Patent number 5,380,171
    • Issue date Jan 10, 1995
    • Hitachi, Ltd.
    • Takashi Nagaoka
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 5,190,438
    • Issue date Mar 2, 1993
    • Hitachi, Ltd.
    • Minoru Taniyama
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum system with a secondary gas also connected to the roughing p...
    • Patent number 5,062,771
    • Issue date Nov 5, 1991
    • Hitachi, Ltd.
    • Akihiko Satou
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Turbo vacuum pump
    • Patent number 5,020,969
    • Issue date Jun 4, 1991
    • Hitachi, Ltd.
    • Masahiro Mase
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 4,904,155
    • Issue date Feb 27, 1990
    • Hitachi, Ltd.
    • Takashi Nagaoka
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • 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

    Method for LPCVD of semiconductors using oil free vacuum pumps
    • Patent number 4,835,114
    • Issue date May 30, 1989
    • Hitachi, Ltd.
    • Akihiko Satou
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Vacuum pump with plural labyrinth seal portions
    • Patent number 4,734,018
    • Issue date Mar 29, 1988
    • Hitachi, Ltd.
    • Minoru Taniyama
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • 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...
  • Information Patent Grant

    Vane angle changing device for an axial fluid machine
    • Patent number 4,618,311
    • Issue date Oct 21, 1986
    • Hitachi, Ltd.
    • Haruo Miura
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES