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Harmonic Drive Systems Inc.

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Strain wave gearing
    • Patent number 12,222,028
    • Issue date Feb 11, 2025
    • Harmonic Drive Systems Inc.
    • Masaru Kobayashi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Strain wave gearing
    • Patent number 12,215,768
    • Issue date Feb 4, 2025
    • Harmonic Drive Systems Inc.
    • Kazumasa Furuta
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Tooth profile designing method for strain wave gearing
    • Patent number 12,209,648
    • Issue date Jan 28, 2025
    • Harmonic Drive Systems Inc.
    • Yuya Murayama
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Rotary encoder
    • Patent number 12,203,746
    • Issue date Jan 21, 2025
    • Harmonic Drive Systems Inc.
    • Shintaro Ueno
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Lubricant sealing structure, strain wave gearing, and actuator
    • Patent number 12,092,221
    • Issue date Sep 17, 2024
    • Harmonic Drive Systems Inc.
    • Daisuke Orii
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Rotary actuator
    • Patent number 12,095,341
    • Issue date Sep 17, 2024
    • Harmonic Drive Systems Inc.
    • Toru Takeda
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Powder lubrication method of strain wave gearing
    • Patent number 12,092,199
    • Issue date Sep 17, 2024
    • Harmonic Drive Systems Inc.
    • Masaru Kobayashi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Method for lubricating strain wave gearing
    • Patent number 12,078,241
    • Issue date Sep 3, 2024
    • Harmonic Drive Systems Inc.
    • Masaru Kobayashi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Strain wave gearing
    • Patent number 12,038,077
    • Issue date Jul 16, 2024
    • Harmonic Drive Systems Inc.
    • Masaru Kobayashi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Strain wave gearing
    • Patent number 12,018,740
    • Issue date Jun 25, 2024
    • Harmonic Drive Systems Inc.
    • Nozomu Tanioka
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Push-pull solenoid
    • Patent number 12,009,149
    • Issue date Jun 11, 2024
    • Harmonic Drive Systems Inc.
    • Masaru Kobayashi
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Strain wave gearing having roller-bearing-type wave generator
    • Patent number 11,982,343
    • Issue date May 14, 2024
    • Harmonic Drive Systems Inc.
    • Masaru Kobayashi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Strain wave gearing provided with three-dimensional tooth profile
    • Patent number 11,946,536
    • Issue date Apr 2, 2024
    • Harmonic Drive Systems Inc.
    • Norio Shirokoshi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Lubricant sealing structure, strain wave gearing, and actuator
    • Patent number 11,885,403
    • Issue date Jan 30, 2024
    • Harmonic Drive Systems Inc.
    • Daisuke Orii
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Dual absolute encoder
    • Patent number 11,874,143
    • Issue date Jan 16, 2024
    • Harmonic Drive Systems Inc.
    • Brian Coyne
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Flat strain wave gearing
    • Patent number 11,841,071
    • Issue date Dec 12, 2023
    • Harmonic Drive Systems Inc.
    • Masaru Kobayashi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Strain wave gearing provided with three-dimensional tooth profile
    • Patent number 11,828,356
    • Issue date Nov 28, 2023
    • Harmonic Drive Systems Inc.
    • Norio Shirokoshi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Optical rotary encoder, servo motor, and actuator
    • Patent number 11,808,612
    • Issue date Nov 7, 2023
    • Harmonic Drive Systems Inc.
    • Shintaro Ueno
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Bearing unit and strain wave gearing
    • Patent number 11,788,581
    • Issue date Oct 17, 2023
    • Harmonic Drive Systems Inc.
    • Yuki Kato
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Planetary reduction gear
    • Patent number 11,739,813
    • Issue date Aug 29, 2023
    • Harmonic Drive Systems Inc.
    • Kohei Isobe
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Strain wave gearing
    • Patent number 11,732,791
    • Issue date Aug 22, 2023
    • Harmonic Drive System Inc.
    • Norio Shirokoshi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Speed ratio switching type strain wave gearing
    • Patent number 11,662,008
    • Issue date May 30, 2023
    • Harmonic Drive Systems Inc.
    • Yuya Murayama
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Wave generator of strain wave gearing device
    • Patent number 11,649,886
    • Issue date May 16, 2023
    • Harmonic Drive Systems Inc.
    • Daisuke Orii
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Strain wave gearing device
    • Patent number 11,603,918
    • Issue date Mar 14, 2023
    • Harmonic Drive Systems Inc.
    • Daisuke Orii
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Unit-type strain wave gearing device
    • Patent number 11,566,695
    • Issue date Jan 31, 2023
    • Harmonic Drive Systems Inc.
    • Naoki Kanayama
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Speed reducer
    • Patent number D971978
    • Issue date Dec 6, 2022
    • Harmonic Drive Systems Inc.
    • Hiroaki Kimura
    • D15 - Machines not elsewhere specified
  • Information Patent Grant

    Wave generator for strain wave gearing
    • Patent number 11,486,481
    • Issue date Nov 1, 2022
    • Harmonic Drive Systems Inc.
    • Syuhei Kobayashi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Rotation transmission mechanism provided with strain wave gearing
    • Patent number 11,441,650
    • Issue date Sep 13, 2022
    • Harmonic Drive Systems Inc.
    • Jun Handa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hollow strain-wave gear device
    • Patent number 11,441,660
    • Issue date Sep 13, 2022
    • Harmonic Drive Systems Inc.
    • Yutaka Miyazawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Rotation transmission mechanism provided with strain wave gearing
    • Patent number 11,391,351
    • Issue date Jul 19, 2022
    • Harmonic Drive Systems Inc.
    • Jun Handa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    LUBRICATING STRUCTURE FOR GEAR TOOTH SURFACE
    • Publication number 20250043861
    • Publication date Feb 6, 2025
    • Harmonic Drive Systems Inc.
    • Norio SHIROKOSHI
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    MACHINE WITH HOLLOW PORTION FOR ELECTRICAL WIRING
    • Publication number 20250015549
    • Publication date Jan 9, 2025
    • Harmonic Drive Systems Inc.
    • Norio SHIROKOSHI
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    BEARING FOR STRAIN WAVE GEARING
    • Publication number 20240418215
    • Publication date Dec 19, 2024
    • Harmonic Drive Systems Inc.
    • Yusuke SHIBAMOTO
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    STRAIN WAVE GEARING
    • Publication number 20240410457
    • Publication date Dec 12, 2024
    • Harmonic Drive Systems Inc.
    • Masaru KOBAYASHI
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    STRAIN WAVE GEARING
    • Publication number 20240376972
    • Publication date Nov 14, 2024
    • HARMONIC DRIVE SYSTEMS INC.
    • Masaru KOBAYASHI
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    STRAIN WAVE GEARING AND ACTUATOR
    • Publication number 20240309945
    • Publication date Sep 19, 2024
    • HARMONIC DRIVE SYSTEMS INC.
    • Masaru KOBAYASHI
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    STRAIN WAVE GEARING
    • Publication number 20240301944
    • Publication date Sep 12, 2024
    • HARMONIC DRIVE SYSTEMS INC.
    • Masaru KOBAYASHI
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    LASER WELDING METHOD
    • Publication number 20240269770
    • Publication date Aug 15, 2024
    • HARMONIC DRIVE SYSTEMS INC.
    • Morihiko YAMAGUCHI
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    STRAIN WAVE GEARING
    • Publication number 20240263693
    • Publication date Aug 8, 2024
    • HARMONIC DRIVE SYSTEMS INC.
    • Masaru KOBAYASHI
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    LUBRICATION METHOD FOR GEAR DEVICE
    • Publication number 20240255050
    • Publication date Aug 1, 2024
    • HARMONIC DRIVE SYSTEMS INC.
    • Yoshihide KIYOSAWA
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    SPACE ROLLING BEARING AND SPACE STRAIN WAVE GEARING DEVICE
    • Publication number 20240255045
    • Publication date Aug 1, 2024
    • HARMONIC DRIVE SYSTEMS INC.
    • Yoshihide KIYOSAWA
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    POWDER LUBRICATION METHOD OF STRAIN WAVE GEARING
    • Publication number 20240229918
    • Publication date Jul 11, 2024
    • HARMONIC DRIVE SYSTEMS INC.
    • Masaru KOBAYASHI
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    METHOD FOR LUBRICATING STRAIN WAVE GEARING
    • Publication number 20240218926
    • Publication date Jul 4, 2024
    • HARMONIC DRIVE SYSTEMS INC.
    • Masaru KOBAYASHI
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    TOOTH PROFILE DESIGNING METHOD FOR STRAIN WAVE GEARING
    • Publication number 20240159305
    • Publication date May 16, 2024
    • HARMONIC DRIVE SYSTEMS INC.
    • Yuya MURAYAMA
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    BRAKE FOR MOTOR
    • Publication number 20240102522
    • Publication date Mar 28, 2024
    • HARMONIC DRIVE SYSTEMS INC.
    • Toru TAKEDA
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    STRAIN WAVE GEARING
    • Publication number 20240052920
    • Publication date Feb 15, 2024
    • HARMONIC DRIVE SYSTEMS INC.
    • Kotaro MATSUZAWA
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    STRAIN WAVE GEARING
    • Publication number 20240044400
    • Publication date Feb 8, 2024
    • Harmonic Drive Systems Inc.
    • Kazumasa FURUTA
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    STRAIN WAVE GEARING
    • Publication number 20240044401
    • Publication date Feb 8, 2024
    • Harmonic Drive Systems Inc.
    • Nozomu TANIOKA
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    STRAIN WAVE GEARING PROVIDED WITH THREE-DIMENSIONAL TOOTH PROFILE
    • Publication number 20230358304
    • Publication date Nov 9, 2023
    • HARMONIC DRIVE SYSTEMS INC.
    • Norio SHIROKOSHI
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    STRAIN WAVE GEARING PROVIDED WITH THREE-DIMENSIONAL TOOTH PROFILE
    • Publication number 20230349458
    • Publication date Nov 2, 2023
    • HARMONIC DRIVE SYSTEMS INC.
    • Norio SHIROKOSHI
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    GEAR SKIVING PROCESS METHOD
    • Publication number 20230330763
    • Publication date Oct 19, 2023
    • HARMONIC DRIVE SYSTEMS INC.
    • Norio SHIROKOSHI
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    SPEED RATIO SWITCHING TYPE STRAIN WAVE GEARING
    • Publication number 20230151881
    • Publication date May 18, 2023
    • HARMONIC DRIVE SYSTEMS INC.
    • Yuya MURAYAMA
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    STRAIN WAVE GEARING HAVING ROLLER-BEARING-TYPE WAVE GENERATOR
    • Publication number 20230116162
    • Publication date Apr 13, 2023
    • HARMONIC DRIVE SYSTEMS INC.
    • Masaru KOBAYASHI
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    LUBRICANT SEALING STRUCTURE, STRAIN WAVE GEARING, AND ACTUATOR
    • Publication number 20230109061
    • Publication date Apr 6, 2023
    • HARMONIC DRIVE SYSTEMS INC.
    • Daisuke ORII
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    LUBRICANT SEALING STRUCTURE, STRAIN WAVE GEARING, AND ACTUATOR
    • Publication number 20230093559
    • Publication date Mar 23, 2023
    • HARMONIC DRIVE SYSTEMS INC.
    • Daisuke ORII
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    ROTARY ENCODER
    • Publication number 20230048463
    • Publication date Feb 16, 2023
    • HARMONIC DRIVE SYSTEMS INC.
    • Shintaro UENO
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    STRAIN WAVE GEARING UNIT
    • Publication number 20230035665
    • Publication date Feb 2, 2023
    • Harmonic Drive Systems Inc.
    • Hiroaki KIMURA
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    DUAL ABSOLUTE ENCODER
    • Publication number 20220381549
    • Publication date Dec 1, 2022
    • Harmonic Drive Systems Inc.
    • Brian COYNE
    • G01 - MEASURING TESTING
  • Information Patent Application

    PUSH-PULL SOLENOID
    • Publication number 20220375670
    • Publication date Nov 24, 2022
    • HARMONIC DRIVE SYSTEMS INC.
    • Masaru KOBAYASHI
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    UNIT-TYPE STRAIN WAVE GEARING
    • Publication number 20220364635
    • Publication date Nov 17, 2022
    • HARMONIC DRIVE SYSTEMS INC.
    • Naoki KANAYAMA
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Trademarklast 30 trademarks

  • Information Trademark

    79410499 - ABACUS
    • Serial number 79410499
    • Filing date Oct 10, 2024
    • HARMONIC DRIVE SYSTEMS INC.
    • 7 - Machines and machine tools
  • Information Trademark

    79372667 - ARBEITROID
    • Serial number 79372667
    • Filing date May 17, 2023
    • HARMONIC DRIVE SYSTEMS INC.
    • 7 - Machines and machine tools
  • Information Trademark

    79251043 - HD SYSTEMS
    • Serial number 79251043
    • Registration number 5830744
    • Filing date Nov 23, 2018
    • HARMONIC DRIVE SYSTEMS INC.
    • 7 - Machines and machine tools
  • Information Trademark

    79237025 - HD
    • Serial number 79237025
    • Registration number 5682782
    • Filing date Mar 19, 2018
    • HARMONIC DRIVE SYSTEMS INC.
    • 7 - Machines and machine tools
  • Information Trademark

    79203052 - ABACUS
    • Serial number 79203052
    • Registration number 5477602
    • Filing date Nov 21, 2016
    • HARMONIC DRIVE SYSTEMS INC.
    • 7 - Machines and machine tools
  • Information Trademark

    79199621 - ROBOT JOBS
    • Serial number 79199621
    • Filing date Aug 2, 2016
    • HARMONIC DRIVE SYSTEMS INC.
    • 7 - Machines and machine tools
  • Information Trademark

    79199620 - ARBEITROID
    • Serial number 79199620
    • Registration number 5234533
    • Filing date Aug 2, 2016
    • Harmonic Drive Systems Inc.
    • 7 - Machines and machine tools
  • Information Trademark

    79174563 - DRIVEIT
    • Serial number 79174563
    • Registration number 5019779
    • Filing date Jul 29, 2015
    • HARMONIC DRIVE SYSTEMS INC.
    • 7 - Machines and machine tools
  • Information Trademark

    86344158 - HARMONICSYN
    • Serial number 86344158
    • Filing date Jul 22, 2014
    • HARMONIC DRIVE SYSTEMS INC.
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
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    79150043 - MUSSER DRIVE
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    • Filing date Mar 10, 2014
    • HARMONIC DRIVE SYSTEMS INC.
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    79150044 - MUSSER GEAR
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    • Filing date Mar 10, 2014
    • HARMONIC DRIVE SYSTEMS INC.
    • 7 - Machines and machine tools
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    79127906 - HARMONIC GREASE
    • Serial number 79127906
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    • Filing date Feb 20, 2013
    • HARMONIC DRIVE SYSTEMS INC.
    • 4 - Industrial oils and greases
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    77030648 - HARMONIC LINEAR DRIVE
    • Serial number 77030648
    • Filing date Oct 27, 2006
    • Harmonic Drive Systems Inc.
    • 7 - Machines and machine tools
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    77030647 - HARMONIC LINEAR
    • Serial number 77030647
    • Filing date Oct 27, 2006
    • Harmonic Drive Systems Inc.
    • 7 - Machines and machine tools
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    77017390 - HARMONIC LINER
    • Serial number 77017390
    • Filing date Oct 10, 2006
    • Harmonic Drive Systems Inc.
    • 7 - Machines and machine tools
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    77017392 - HARMONIC LINER DRIVE
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    • Filing date Oct 10, 2006
    • Harmonic Drive Systems Inc.
    • 7 - Machines and machine tools
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    79022542 - HARMONICPLANETARY
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    • Registration number 3365998
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    • HARMONIC DRIVE SYSTEMS INC.
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
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    79030085 - HD
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    • HARMONIC DRIVE SYSTEMS INC.
    • 7 - Machines and machine tools
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    76504132 - HARMONICSYN
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    • Registration number 2873679
    • Filing date Apr 7, 2003
    • Harmonic Drive Systems Inc.
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments