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Yasushi Maejima

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Patents Grantslast 30 patents

  • Information Patent Grant

    Vacuum pump and stator component of thread groove pump portion of t...
    • Patent number 12,158,152
    • Issue date Dec 3, 2024
    • Edwards Japan Limited
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 12,044,251
    • Issue date Jul 23, 2024
    • Edwards Japan Limited
    • Hideki Enosawa
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump, rotor, and washer
    • Patent number 11,946,482
    • Issue date Apr 2, 2024
    • Edwards Japan Limited
    • Katsuhisa Yokozuka
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump and heating device therefor
    • Patent number 11,889,595
    • Issue date Jan 30, 2024
    • Edwards Japan Limited
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump, cylindrical portion used in vacuum pump, and base portion
    • Patent number 11,480,182
    • Issue date Oct 25, 2022
    • Edwards Japan Limited
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Adaptor and vacuum pump
    • Patent number 11,466,692
    • Issue date Oct 11, 2022
    • Edwards Japan Limited
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump, and control device of vacuum pump
    • Patent number 11,384,770
    • Issue date Jul 12, 2022
    • Edwards Japan Limited
    • Hideo Fukami
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Stator-side member and vacuum pump
    • Patent number 10,704,555
    • Issue date Jul 7, 2020
    • Edwards Japan Limited
    • Yoshiyuki Sakaguchi
    • F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
  • Information Patent Grant

    Vacuum pump and abnormality cause estimating method for vacuum pump
    • Patent number 10,578,158
    • Issue date Mar 3, 2020
    • Edwards Japan Limited
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 10,480,523
    • Issue date Nov 19, 2019
    • Edwards Japan Limited
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 10,364,814
    • Issue date Jul 30, 2019
    • Edwards Japan Limited
    • Yongwei Shi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 10,001,126
    • Issue date Jun 19, 2018
    • Edwards Japan Limited
    • Tooru Miwata
    • F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
  • Information Patent Grant

    Rotor and vacuum pump equipped with same
    • Patent number 9,982,682
    • Issue date May 29, 2018
    • Edwards Japan Limited
    • Yoshinobu Ohtachi
    • F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
  • Information Patent Grant

    Exhaust pump
    • Patent number 9,790,946
    • Issue date Oct 17, 2017
    • Edwards Japan Limited
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 8,690,525
    • Issue date Apr 8, 2014
    • Edwards Japan Limited
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Molecular pump and flange having shock absorbing member
    • Patent number 8,403,652
    • Issue date Mar 26, 2013
    • Edwards Japan Limited
    • Yasushi Maejima
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 7,753,661
    • Issue date Jul 13, 2010
    • BOC Edwards Japan Limited
    • Satoshi Okudera
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Fixing structure for fixing rotor to rotor shaft, and turbo molecul...
    • Patent number 7,390,164
    • Issue date Jun 24, 2008
    • Edwards Japan Limited
    • Yasushi Maejima
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 6,890,145
    • Issue date May 10, 2005
    • BOC Edwards Technologies Limited
    • Masayoshi Takamine
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Turbo-molecular pump
    • Patent number 6,854,956
    • Issue date Feb 15, 2005
    • BOC Edwards Technologies Limited
    • Tooru Miwata
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 6,824,349
    • Issue date Nov 30, 2004
    • BOC Edwards Technologies Limited
    • Satoshi Okudera
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 6,814,536
    • Issue date Nov 9, 2004
    • BOC Edwards Technologies Limited
    • Yoshiyuki Sakaguchi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 6,752,588
    • Issue date Jun 22, 2004
    • BOC Edwards Technologies Limited
    • Shinji Kawanishi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 6,709,226
    • Issue date Mar 23, 2004
    • BOC Edwards Technologies Limited
    • Yasushi Maejima
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 6,705,830
    • Issue date Mar 16, 2004
    • BOC Edwards Techonlogies Limited
    • Yoshihiro Yamashita
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Magnetic bearing type vacuum pump
    • Patent number 6,559,568
    • Issue date May 6, 2003
    • Seiko Instruments Inc.
    • Yasushi Maejima
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Turbo molecular pump
    • Patent number 6,499,973
    • Issue date Dec 31, 2002
    • Seiko Instruments Inc.
    • Yasushi Maejima
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Magnetic bearing device and a vacuum pump equipped with the same
    • Patent number 6,465,924
    • Issue date Oct 15, 2002
    • Seiko Instruments Inc.
    • Yasushi Maejima
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Magnetic bearing apparatus with radial position correcting electrom...
    • Patent number 6,023,115
    • Issue date Feb 8, 2000
    • Seiko Seiki Kabushiki Kaisha
    • Yasushi Maejima
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Electromagnetic rotary machine having magnetic bearing
    • Patent number 5,955,811
    • Issue date Sep 21, 1999
    • Chiba; Akira
    • Akira Chiba
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    VACUUM PUMP, VACUUM PUMP CONTROLLER, AND REMOTE CONTROLLER
    • Publication number 20240167484
    • Publication date May 23, 2024
    • EDWARDS JAPAN LIMITED
    • Masayuki Hashimoto
    • G08 - SIGNALLING
  • Information Patent Application

    VACUUM EXHAUST APPARATUS AND VACUUM PUMP USED THEREIN
    • Publication number 20220397122
    • Publication date Dec 15, 2022
    • EDWARDS JAPAN LIMITED
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP, ROTOR, AND WASHER
    • Publication number 20220268289
    • Publication date Aug 25, 2022
    • EDWARDS JAPAN LIMITED
    • Katsuhisa Yokozuka
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP AND STATOR COMPONENT OF THREAD GROOVE PUMP PORTION OF T...
    • Publication number 20220235776
    • Publication date Jul 28, 2022
    • Edwards Japan Limited
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP
    • Publication number 20220163053
    • Publication date May 26, 2022
    • Edwards Japan Limited
    • Hideki Enosawa
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP, CYLINDRICAL PORTION USED IN VACUUM PUMP, AND BASE PORTION
    • Publication number 20210293244
    • Publication date Sep 23, 2021
    • Edwards Japan Limited
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP, AND CONTROL DEVICE OF VACUUM PUMP
    • Publication number 20210123449
    • Publication date Apr 29, 2021
    • EDWARDS JAPAN LIMITED
    • Hideo Fukami
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP AND HEATING DEVICE THEREFOR
    • Publication number 20200092952
    • Publication date Mar 19, 2020
    • EDWARDS JAPAN LIMITED
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    ROTOR AND VACUUM PUMP EQUIPPED WITH SAME
    • Publication number 20180128280
    • Publication date May 10, 2018
    • EDWARDS JAPAN LIMITED
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    ADAPTOR AND VACUUM PUMP
    • Publication number 20180038375
    • Publication date Feb 8, 2018
    • Edwards Japan Limited
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP
    • Publication number 20170363101
    • Publication date Dec 21, 2017
    • Edwards Japan Limited
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP AND ABNORMALITY CAUSE ESTIMATING METHOD FOR VACUUM PUMP
    • Publication number 20170248166
    • Publication date Aug 31, 2017
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Vacuum Pump
    • Publication number 20160025096
    • Publication date Jan 28, 2016
    • EDWARDS JAPAN LIMITED
    • Yongwei Shi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    STATOR-SIDE MEMBER AND VACUUM PUMP
    • Publication number 20150240822
    • Publication date Aug 27, 2015
    • EDWARDS JAPAN LIMITED
    • Yoshiyuki Sakaguchi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    ROTOR AND VACUUM PUMP EQUIPPED WITH SAME
    • Publication number 20150240829
    • Publication date Aug 27, 2015
    • EDWARDS JAPAN LIMITED
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    EXHAUST PUMP
    • Publication number 20130164124
    • Publication date Jun 27, 2013
    • EDWARDS JAPAN LIMITED
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP
    • Publication number 20120143390
    • Publication date Jun 7, 2012
    • EDWARDS JAPAN LIMITED
    • Tooru Miwata
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP AND MEMBER USED FOR VACUUM PUMP
    • Publication number 20120141254
    • Publication date Jun 7, 2012
    • EDWARDS JAPAN LIMITED
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP
    • Publication number 20110103934
    • Publication date May 5, 2011
    • Yoshinobu Ohtachi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Molecular Pump And Flange
    • Publication number 20090081056
    • Publication date Mar 26, 2009
    • Yasushi Maejima
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Fixing structure for fixing rotor to rotor shaft, and turbo molecul...
    • Publication number 20070031270
    • Publication date Feb 8, 2007
    • BOC EDWARDS JAPAN LIMITED
    • Yasushi Maejima
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Vacuum pump
    • Publication number 20060140776
    • Publication date Jun 29, 2006
    • Satoshi Okudera
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Motor control system, motor apparatus, vacuum pump, correction curr...
    • Publication number 20040212333
    • Publication date Oct 28, 2004
    • Yoshinobu Ohtachi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    Turbo-molecular pump
    • Publication number 20030175113
    • Publication date Sep 18, 2003
    • Tooru Miwata
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Vacuum pump
    • Publication number 20030095860
    • Publication date May 22, 2003
    • Masayoshi Takamine
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Vacuum pump
    • Publication number 20030095861
    • Publication date May 22, 2003
    • Yoshiyuki Sakaguchi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Vacuum pump
    • Publication number 20030095862
    • Publication date May 22, 2003
    • Shinji Kawanishi
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Vacuum pump
    • Publication number 20030095863
    • Publication date May 22, 2003
    • Satoshi Okudera
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Vacuum pump
    • Publication number 20030021673
    • Publication date Jan 30, 2003
    • Yasushi Maejima
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Vacuum pump
    • Publication number 20030021672
    • Publication date Jan 30, 2003
    • Yasushi Maejima
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...