WO2004082100A3 - Machine electrique tournante comportant un stator et deux rotors - Google Patents

Machine electrique tournante comportant un stator et deux rotors Download PDF

Info

Publication number
WO2004082100A3
WO2004082100A3 PCT/FR2004/000530 FR2004000530W WO2004082100A3 WO 2004082100 A3 WO2004082100 A3 WO 2004082100A3 FR 2004000530 W FR2004000530 W FR 2004000530W WO 2004082100 A3 WO2004082100 A3 WO 2004082100A3
Authority
WO
WIPO (PCT)
Prior art keywords
stator
rotors
electric machine
rotary electric
external
Prior art date
Application number
PCT/FR2004/000530
Other languages
English (en)
Other versions
WO2004082100A2 (fr
Inventor
Akar Atef Abou
Eric Coupart
Jacques Saint-Michel
Original Assignee
Leroy Somer Moteurs
Akar Atef Abou
Eric Coupart
Jacques Saint-Michel
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Leroy Somer Moteurs, Akar Atef Abou, Eric Coupart, Jacques Saint-Michel filed Critical Leroy Somer Moteurs
Priority to US10/546,841 priority Critical patent/US7250702B2/en
Priority to JP2006505699A priority patent/JP2006520178A/ja
Priority to EP04717671A priority patent/EP1599930A2/fr
Publication of WO2004082100A2 publication Critical patent/WO2004082100A2/fr
Publication of WO2004082100A3 publication Critical patent/WO2004082100A3/fr

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2786Outer rotors
    • H02K1/2787Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2789Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2791Surface mounted magnets; Inset magnets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2706Inner rotors
    • H02K1/272Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278Surface mounted magnets; Inset magnets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K16/00Machines with more than one rotor or stator
    • H02K16/02Machines with one stator and two or more rotors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/18Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/64Electric machine technologies in electromobility

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

La présente invention concerne une machine électrique comportant, un stator (10; 40) comportant une pluralité de dents (11; 41) supportant chacune au moins une bobine (13; 46; 47) individuelle, un rotor extérieur (30) disposé radialement à l'extérieur du stator et comportant des aimants permanents, un rotor intérieur (20) disposé radialement à l'intérieur du stator, comportant des aimants permanents, et solidaire du rotor extérieur (30), l'un au moins du rotor extérieur (30) et du rotor intérieur (20) étant à concentration de flux.
PCT/FR2004/000530 2003-03-06 2004-03-05 Machine electrique tournante comportant un stator et deux rotors WO2004082100A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US10/546,841 US7250702B2 (en) 2003-03-06 2004-03-05 Rotary electric machine comprising a stator and two rotors
JP2006505699A JP2006520178A (ja) 2003-03-06 2004-03-05 1個の固定子と2個の回転子を有する回転電機
EP04717671A EP1599930A2 (fr) 2003-03-06 2004-03-05 Machine electrique tournante comportant un stator et deux rotors

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0302776A FR2852162B1 (fr) 2003-03-06 2003-03-06 Machine electrique tournante comportant un stator et deux rotors
FR03/02776 2003-03-06

Publications (2)

Publication Number Publication Date
WO2004082100A2 WO2004082100A2 (fr) 2004-09-23
WO2004082100A3 true WO2004082100A3 (fr) 2004-10-28

Family

ID=32865290

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2004/000530 WO2004082100A2 (fr) 2003-03-06 2004-03-05 Machine electrique tournante comportant un stator et deux rotors

Country Status (6)

Country Link
US (1) US7250702B2 (fr)
EP (1) EP1599930A2 (fr)
JP (1) JP2006520178A (fr)
CN (1) CN100559685C (fr)
FR (1) FR2852162B1 (fr)
WO (1) WO2004082100A2 (fr)

Families Citing this family (66)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7081696B2 (en) * 2004-08-12 2006-07-25 Exro Technologies Inc. Polyphasic multi-coil generator
JP4461078B2 (ja) * 2005-07-27 2010-05-12 三菱重工業株式会社 風力発電装置
US20080088200A1 (en) * 2006-06-08 2008-04-17 Jonathan Ritchey Poly-phasic multi-coil generator
FR2903824A1 (fr) * 2006-07-13 2008-01-18 Leroy Somer Moteurs Rotor de machine tournante electrique et procede de fabrication
US7592736B2 (en) * 2007-01-03 2009-09-22 Terry Scott Permanent magnet electric generator with rotor circumferentially encircling stator
US7642684B2 (en) * 2007-02-15 2010-01-05 Hamilton Sunstrand Corporation Nested variable field dynamoelectric machine
US8288916B2 (en) * 2007-09-13 2012-10-16 Eric Stephane Quere Composite electromechanical machines with uniform magnets
GB0800463D0 (en) * 2008-01-11 2008-02-20 Magnomatics Ltd Magnetic drive systems
US7994674B2 (en) * 2008-01-25 2011-08-09 Mcclellan W Thomas Flux-focused shaped permanent magnet, magnetic unit having the magnets, device having the magnetic units and method for asymmetrically focusing flux fields of permanent magnets
JP5241329B2 (ja) * 2008-05-30 2013-07-17 タカタ株式会社 電動機の巻線方法、電動機及びそれを備えたシートベルト装置
GB0814399D0 (en) * 2008-08-08 2008-09-10 Rolls Royce Plc Variable gear ratio magnetic gearbox
FR2935204B1 (fr) * 2008-08-20 2016-01-01 Michelin Soc Tech Rotor interieur a arbre rainure pour machine electrique tournante
FR2935206B1 (fr) * 2008-08-20 2010-10-08 Michelin Soc Tech Rotor interieur pour machine electrique a cales d'aimants en forme de "t"
FR2935205B1 (fr) 2008-08-20 2010-10-08 Michelin Soc Tech Rotor interieur pour machine electrique tournante et son procede d'assemblage
GB0900022D0 (en) * 2009-01-05 2009-02-11 Rolls Royce Plc Management gear arrangement
JP5299679B2 (ja) * 2009-02-06 2013-09-25 株式会社デンソー モータジェネレータ
GB0904434D0 (en) * 2009-03-13 2009-04-29 Switched Reluctance Drives Ltd An electrical machine with dual radial airgaps
GB0905343D0 (en) 2009-03-27 2009-05-13 Ricardo Uk Ltd A flywheel
US8375695B2 (en) * 2009-06-30 2013-02-19 General Electric Company Aircraft gas turbine engine counter-rotatable generator
US8063528B2 (en) * 2009-12-18 2011-11-22 General Electric Company Counter-rotatable generator
US20120299430A1 (en) * 2009-12-22 2012-11-29 Hoganas Ab (Publ) Rotor for modulated pole machine
FR2957729B1 (fr) * 2010-03-19 2013-01-25 Astrium Sas Moteur electrique a aimants permanents comportant un stator fractionne
DE102010027875A1 (de) 2010-04-16 2011-10-20 Osram Opto Semiconductors Gmbh Optoelektronisches Bauelement und Verfahren zum Herstellen eines optoelektronischen Bauelements
CN101841280B (zh) * 2010-05-04 2012-06-20 江苏大学 一种应用鼠笼式调磁装置的同心磁力齿轮
GB2483076A (en) * 2010-08-25 2012-02-29 Stored Energy Technology Ltd Electric machine with enhanced tolerance to phase failure
FR2967310B1 (fr) * 2010-11-04 2013-08-02 Xap Moteur electromagnetique sans balai
DE102010050545A1 (de) * 2010-11-09 2012-05-10 Agentur Zweitakter Gmbh Wechselstrom-Generator
GB201019473D0 (en) * 2010-11-17 2010-12-29 Ricardo Uk Ltd An improved coupler
US20120169169A1 (en) * 2011-01-05 2012-07-05 Sung-Tsai Wu Kinetic energy supplementary device
JP5722690B2 (ja) 2011-04-19 2015-05-27 T.K Leverage株式会社 発電装置
GB201106768D0 (en) 2011-04-20 2011-06-01 Ricardo Uk Ltd An energy storage system
US8796895B2 (en) * 2011-05-26 2014-08-05 Lg Electronics Inc. Electric motor and electric vehicle having the same
JP2013062889A (ja) * 2011-09-10 2013-04-04 Nidec Servo Corp ブラシレスdcモータ
CN103296789A (zh) * 2012-03-05 2013-09-11 德昌电机(深圳)有限公司 永磁电机及应用该永磁电机的无叶风扇
US9343931B2 (en) * 2012-04-06 2016-05-17 David Deak Electrical generator with rotational gaussian surface magnet and stationary coil
WO2013184961A1 (fr) * 2012-06-06 2013-12-12 Nidec Motor Corporation Moteur doté d'un rotor extérieur à rayons pourvu de segments de pôle éloignés les uns des autres
US10326322B2 (en) * 2012-08-20 2019-06-18 Rensselaer Polytechnic Institute Double-rotor flux-switching machine
AP2015008523A0 (en) * 2012-11-30 2015-06-30 Yamaha Motor Co Ltd Engine unit and vehicle
KR101497502B1 (ko) * 2013-02-19 2015-03-03 (주) 코모텍 전동기 및 전동기 제조방법
JP5647307B1 (ja) * 2013-06-04 2014-12-24 成田 憲治 直流励磁界磁型同期電動機
ES2543690B1 (es) * 2014-02-21 2016-03-17 José María DEL PINO PÉREZ Turbina de generación magnética
JP6257114B2 (ja) * 2014-05-20 2018-01-10 株式会社Ihi 磁気波動歯車装置
EP3007336B1 (fr) * 2014-10-07 2016-11-30 C.R.F. Società Consortile per Azioni Machine électrique synchrone à deux rotors
DE102016108429A1 (de) * 2015-05-08 2016-11-10 Johnson Electric S.A. Einphasiger Außenläufermotor und Läufer hiervon
JP6820090B2 (ja) * 2015-07-21 2021-01-27 三星電子株式会社Samsung Electronics Co.,Ltd. 洗濯機、および、そのモータ
KR102595183B1 (ko) * 2015-07-21 2023-10-30 삼성전자주식회사 세탁기용 모터, 및 이를 구비한 세탁기
CN106100268A (zh) * 2016-08-23 2016-11-09 江西韵动新能源研究院有限公司 一种内外双转子永磁电机
JP2020521418A (ja) 2017-05-23 2020-07-16 ディーピーエム テクノロジーズ インク. 可変コイル結線システム
CN107317445A (zh) * 2017-06-23 2017-11-03 贵州宝文电机科技有限公司 多层轮毂电机及轮毂
CN107551848B (zh) * 2017-10-16 2023-05-19 上海弗鲁克科技发展有限公司 高粘度组合式工作头
WO2019089435A1 (fr) 2017-10-30 2019-05-09 Deak David Sr Générateur de transfert de moment magnétique
US10826365B2 (en) * 2017-12-20 2020-11-03 Samsung Electronics Co., Ltd. Motor
UA124412C2 (uk) 2017-12-22 2021-09-15 Євгеній Віталійович Мушинський Контрроторний синхронний електромеханічний перетворювач
US10944302B2 (en) * 2018-04-09 2021-03-09 Williams International Co., L.L.C. Permanent-magnet generator incorporating a variable-reluctance stator system
FR3083386B1 (fr) * 2018-06-28 2021-05-14 Telma Ensemble ralentisseur electromagnetique et generatrice et vehicule comportant un tel ensemble
US11732769B2 (en) 2019-01-09 2023-08-22 Green Wave Power Systems Llc Magnetically-coupled torque-assist apparatus
US11539281B2 (en) 2019-01-09 2022-12-27 Green Wave Power Systems Llc Magnetically-coupled torque-assist apparatus
AU2020207027A1 (en) 2019-01-09 2021-09-02 Green Wave Power Systems Llc System and method for perturbing a permanent magnet asymmetric field to move a body
US11722026B2 (en) 2019-04-23 2023-08-08 Dpm Technologies Inc. Fault tolerant rotating electric machine
US11973391B2 (en) 2019-11-21 2024-04-30 Wepower Technologies Llc Tangentially actuated magnetic momentum transfer generator
CN112311175A (zh) * 2020-05-29 2021-02-02 深圳市一吉制造有限公司 一种新型两定子四转子的组合节能电机
CN112311174A (zh) * 2020-05-29 2021-02-02 深圳市一吉制造有限公司 一种新型四定子四转子的组合节能电机
CA3217299A1 (fr) 2021-05-04 2022-11-10 Tung Nguyen Systemes et procedes de commande de batterie
CA3159864A1 (fr) 2021-05-13 2022-11-13 Exro Technologies Inc. Methode et appareil d'entrainement des bobines d'une machine electrique multiphasee
US11646630B2 (en) 2021-09-30 2023-05-09 Green Wave Power Systems Llc System and method for generating rotation of a body to generate energy and reduce climate change
WO2023123639A1 (fr) * 2021-12-29 2023-07-06 大富科技(安徽)股份有限公司 Structure de moteur, moteur de moyeu et véhicule

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4227105A (en) * 1976-06-21 1980-10-07 Shokichi Kumakura Annular magnet assembly
FR2653274A1 (fr) * 1989-10-16 1991-04-19 Auxilec Perfectionnement au moteur electrique du type moteur a courant continu sans balai.
EP1003267A2 (fr) * 1998-11-17 2000-05-24 Yukio Kinoshita Moteur et Générateur du type à aimants permanents
EP1102385A2 (fr) * 1999-11-18 2001-05-23 Denso Corporation Machine électrique tournante pour véhicule
US20020047425A1 (en) * 2000-05-03 2002-04-25 Moteurs Leroy-Somer Rotary electric machine having a flux-concentrating rotor and a stator with windings on teeth
US20020171305A1 (en) * 2001-04-17 2002-11-21 Moteurs Leroy-Somer Electric machine having an outer rotor

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3914859A (en) * 1974-01-17 1975-10-28 Ray T Pierson Method of fabricating closed slot stator construction particularly adapted for stepper motors
JPS60156231A (ja) * 1984-01-25 1985-08-16 Japan Servo Co Ltd 回転電機の固定子
RU2074761C1 (ru) * 1995-06-29 1997-03-10 Научно-производственное предприятие "Эксин" Приводное устройство для передвижных средств
JPH11341757A (ja) * 1998-05-21 1999-12-10 Toyota Motor Corp 電動機および動力伝達装置並びにハイブリッド車両
JP2000134848A (ja) * 1998-10-26 2000-05-12 Aisin Seiki Co Ltd 電動機
JP4000746B2 (ja) * 2000-03-29 2007-10-31 株式会社デンソー 車両用回転電機
JP2001145209A (ja) * 1999-11-18 2001-05-25 Denso Corp 車両用回転電機
JP2001268866A (ja) * 2000-03-15 2001-09-28 Denso Corp 車両用回転電機
JP2001211582A (ja) * 2000-01-26 2001-08-03 Fujitsu General Ltd 永久磁石電動機
ES2186664T3 (es) 2000-05-03 2003-05-16 Leroy Somer Moteurs Maquina giratoria electrica de rotor con concentracion de flujo y con estator bobinado sobre dientes.
JP4269544B2 (ja) * 2000-09-14 2009-05-27 株式会社デンソー 複数ロータ型同期機
US6611076B2 (en) * 2000-12-20 2003-08-26 Solar Turbines Inc. Tooth tip for a high speed generator
JP2002315243A (ja) * 2001-04-13 2002-10-25 Hitachi Ltd 永久磁石式回転電機
EP1251023B1 (fr) 2001-04-17 2004-11-17 Moteurs Leroy-Somer Machine électrique à rotor extérieur
US6700288B2 (en) * 2001-08-15 2004-03-02 Drs Power & Control Technologies, Inc. High speed rotor
JP3671884B2 (ja) * 2001-08-30 2005-07-13 日産自動車株式会社 回転電機
US6727632B2 (en) * 2001-11-27 2004-04-27 Denso Corporation Flat rotary electric machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4227105A (en) * 1976-06-21 1980-10-07 Shokichi Kumakura Annular magnet assembly
FR2653274A1 (fr) * 1989-10-16 1991-04-19 Auxilec Perfectionnement au moteur electrique du type moteur a courant continu sans balai.
EP1003267A2 (fr) * 1998-11-17 2000-05-24 Yukio Kinoshita Moteur et Générateur du type à aimants permanents
EP1102385A2 (fr) * 1999-11-18 2001-05-23 Denso Corporation Machine électrique tournante pour véhicule
US20020047425A1 (en) * 2000-05-03 2002-04-25 Moteurs Leroy-Somer Rotary electric machine having a flux-concentrating rotor and a stator with windings on teeth
US20020171305A1 (en) * 2001-04-17 2002-11-21 Moteurs Leroy-Somer Electric machine having an outer rotor

Also Published As

Publication number Publication date
US7250702B2 (en) 2007-07-31
WO2004082100A2 (fr) 2004-09-23
CN1757151A (zh) 2006-04-05
CN100559685C (zh) 2009-11-11
EP1599930A2 (fr) 2005-11-30
FR2852162B1 (fr) 2005-09-23
FR2852162A1 (fr) 2004-09-10
US20060175923A1 (en) 2006-08-10
JP2006520178A (ja) 2006-08-31

Similar Documents

Publication Publication Date Title
WO2004082100A3 (fr) Machine electrique tournante comportant un stator et deux rotors
EP1630930A3 (fr) Moteur à réluctance commutée à réfroidissement par liquide
EP1501168A3 (fr) Machine électrique à aimant permanent sans balai à faible pulsation et ondulation de couple et son procédé de fabrication
EP1786088A3 (fr) Machine synchrone à reluctance avec nouvelle topologie du rotor
WO2006058871A3 (fr) Machine synchrone multipolaire a excitation permanente, pourvue de bobines a dents
WO2008078817A1 (fr) Unité motrice
WO2007031679A3 (fr) Stator polyphase de machine electrique tournante a rotor a griffes et alternateur ou alterno-demarreur comportant un tel stator
EP1501172A3 (fr) Machine sans balais à aimants permanents avec un rotor magnétisé par sections axiales d'obliquité différente, et procédé pour sa fabrication
EP1237259A3 (fr) Machine électrique tournante et système générateur de puissance utilisant la même
DE502006009420D1 (de) Elektrische Maschine
EP1087501A3 (fr) Moteur/générateur avec plusieurs rotors
WO2007022128A3 (fr) Machine electromecanique sans balais
EP1233503A3 (fr) Moteur à courant continu sans balais et son procédé de fabrication
EP1220426A3 (fr) Dispositif électro-mécanique rotatif et système d'entraínement par poulie l'utilisant
EP2256909A3 (fr) Machine rotative électrique
TW200633345A (en) Axial-gap type superconducting motor
EP2133981A3 (fr) Machine électrique à haute densité de couple
TW200717968A (en) An electric machine assembly
SE9904799D0 (sv) Electrical machine stator and rotor
CA2539680A1 (fr) Generatrice de type tournant en tandem produisant deux tensions
AU2003214086A1 (en) Torque motor having a segment design
TW200518421A (en) Electromagnetic motor
TW200642233A (en) Single-phase brushless motor
AU2003271527A1 (en) Three-phase synchronous machine comprising a permanent magnet rotor and an induction cage
WO2005118004A3 (fr) Machine dynamoelectrique rotative presentant une partie anterieure en fer

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2004717671

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2006505699

Country of ref document: JP

Ref document number: 2004806118X

Country of ref document: CN

ENP Entry into the national phase

Ref document number: 2006175923

Country of ref document: US

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 10546841

Country of ref document: US

WWP Wipo information: published in national office

Ref document number: 2004717671

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 10546841

Country of ref document: US