DE3006778A1 - Schwingungsdaempfer - Google Patents
SchwingungsdaempferInfo
- Publication number
- DE3006778A1 DE3006778A1 DE19803006778 DE3006778A DE3006778A1 DE 3006778 A1 DE3006778 A1 DE 3006778A1 DE 19803006778 DE19803006778 DE 19803006778 DE 3006778 A DE3006778 A DE 3006778A DE 3006778 A1 DE3006778 A1 DE 3006778A1
- Authority
- DE
- Germany
- Prior art keywords
- vibration damper
- outer housing
- tuning
- central bore
- chambers
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/001—Vibration damping devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/42—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing
- F16F1/52—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing loaded in combined stresses
- F16F1/54—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing loaded in combined stresses loaded in compression and shear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
- F16F13/22—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper characterised by comprising also a dynamic damper
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
- F16F13/24—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the central part of the unit being supported by one element and both extremities of the unit being supported by a single other element, i.e. double acting mounting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/001—Vibration damping devices
- B64C2027/005—Vibration damping devices using suspended masses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2236/00—Mode of stressing of basic spring or damper elements or devices incorporating such elements
- F16F2236/12—Mode of stressing of basic spring or damper elements or devices incorporating such elements loaded in combined stresses
- F16F2236/123—Mode of stressing of basic spring or damper elements or devices incorporating such elements loaded in combined stresses loaded in compression and shear
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Aviation & Aerospace Engineering (AREA)
- Combined Devices Of Dampers And Springs (AREA)
- Vibration Prevention Devices (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/015,230 US4236607A (en) | 1979-02-26 | 1979-02-26 | Vibration suppression system |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3006778A1 true DE3006778A1 (de) | 1980-09-04 |
DE3006778C2 DE3006778C2 (US20110009641A1-20110113-C00116.png) | 1989-08-17 |
Family
ID=21770229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19803006778 Granted DE3006778A1 (de) | 1979-02-26 | 1980-02-22 | Schwingungsdaempfer |
Country Status (13)
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10214325A1 (de) * | 2002-03-28 | 2003-10-16 | Zf Lemfoerder Metallwaren Ag | Verfahren zum Betreiben eines Hydrolagers und hierfür ausgebildetes Lager |
Families Citing this family (78)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4430045A (en) | 1979-04-24 | 1984-02-07 | Bell Helicopter Textron, Inc. | Helicopter power train for distributing rotor blade flapping displacements through a plurality of drive train components |
FR2528382A1 (fr) * | 1982-06-11 | 1983-12-16 | Vibrachoc Sa | Amortisseur de vibrations et notamment adaptateur de frequence pour pale d'helicoptere |
JPH073072Y2 (ja) * | 1985-02-22 | 1995-01-30 | 日産自動車株式会社 | 車両用ストラツト装置 |
US4753422A (en) * | 1986-01-30 | 1988-06-28 | Thorn Richard P | Quiet acting low friction decouplers for fluid filled vibration isolators |
GB2186862A (en) * | 1986-02-20 | 1987-08-26 | Tape Dispensers Limited | Improved method and apparatus for finishing joints |
FR2629545B1 (fr) * | 1988-03-30 | 1993-02-19 | Aerospatiale | Contre-fiche elastique a resonateur hydro-mecanique integre notamment pour la suspension d'une boite de transmission sur un giravion et dispositif de suspension en comportant application |
FR2630798B1 (fr) * | 1988-05-02 | 1990-07-27 | Peugeot | Articulation elastique et suspension de roue de vehicule automobile |
IT1232884B (it) * | 1989-07-26 | 1992-03-05 | Fiat Auto Spa | Sopporto elastico in particolare per motori di autoveicoli con sfasatore incorporato |
IT1237779B (it) * | 1989-11-20 | 1993-06-17 | Pirelli Sistemi Antivibranti | Supporto motore. |
US5388811A (en) * | 1991-07-09 | 1995-02-14 | Lord Corporation | Torque-control system for vehicles cabs and the like |
US5127607A (en) * | 1991-07-09 | 1992-07-07 | Lord Corporation | Fluid torque-restraint system with optimized fluid expansion |
US5174552A (en) * | 1991-10-15 | 1992-12-29 | Lord Corporation | Fluid mount with active vibration control |
US5312093A (en) * | 1992-01-28 | 1994-05-17 | Applied Power Inc. | Vibration isolator with two pairs of fluid chambers with diagonal fluid communication |
US5538373A (en) * | 1992-02-20 | 1996-07-23 | Giddings & Lewis, Inc. | Machine tool vibration isolation system |
US6022600A (en) * | 1992-04-24 | 2000-02-08 | Lord Corporation | High-temperature fluid mounting |
DE69332867T2 (de) * | 1992-06-18 | 2003-12-11 | Lord Corp | Magnetorheologische Flüssigkeitsvorrichtungen |
US5374039A (en) * | 1992-08-24 | 1994-12-20 | Lord Corporation | Fluid-and-elastomer support device |
US5314308A (en) * | 1992-12-11 | 1994-05-24 | Dynamic Engineering, Inc. | System for controlling higher harmonic vibrations in helicopter rotor blades |
FR2703121B1 (fr) * | 1993-03-25 | 1995-06-23 | Bertin & Cie | Dispositif anti-vibratoire de support d'une masse vibrante. |
US5435531A (en) * | 1993-08-18 | 1995-07-25 | Bell Helicopter Textron Inc. | Vibration isolation system |
US5788029A (en) * | 1993-08-18 | 1998-08-04 | Bell Helicopter | Vibration isolation system |
US5439082A (en) * | 1994-04-01 | 1995-08-08 | Bell Helicopter Textron Inc. | Hydraulic inertial vibration isolator |
US5540549A (en) * | 1994-08-05 | 1996-07-30 | Lord Corporation | Fluid damping devices |
US5762295A (en) * | 1996-02-23 | 1998-06-09 | Lord Corporation | Dynamically optimized engine suspension system |
US5788372A (en) * | 1996-05-10 | 1998-08-04 | Lord Corporation | Method and apparatus for reducing transient motion between an aircraft power member and structure during takeoff, landing and maneuvers |
US5918833A (en) * | 1997-01-16 | 1999-07-06 | Applied Power Inc. | Hydraulic torque restraint system |
US6035981A (en) * | 1997-05-20 | 2000-03-14 | Vistek, Inc. | Conservative broadband passive mass damper |
US6009983A (en) * | 1997-05-30 | 2000-01-04 | Bell Helicopter Textron, Inc. | Method and apparatus for improved vibration isolation |
US6032936A (en) * | 1997-08-04 | 2000-03-07 | Lord Corporation | Fluid mount including a partitionless compensator |
US6293532B2 (en) | 1997-08-04 | 2001-09-25 | Lord Corporation | Fluid and elastomer apparatus |
US6092795A (en) * | 1997-08-04 | 2000-07-25 | Lord Corporation | Fluid and elastomer damper |
US6132183A (en) * | 1998-11-23 | 2000-10-17 | Carrier Corporation | Compressor mounting |
DE19954975A1 (de) * | 1999-11-16 | 2001-03-29 | Daimler Chrysler Ag | Hydraulisch dämpfendes Lager |
US6431530B1 (en) | 2000-05-23 | 2002-08-13 | Bell Helicopter Textron, Inc. | Vertical liquid inertia vibration isolator |
US6695106B2 (en) | 2000-09-26 | 2004-02-24 | Bell Helicopter Textron, Inc. | Method and apparatus for improved vibration isolation |
WO2003104675A2 (en) | 2002-06-07 | 2003-12-18 | Boart Longyear Limited | Vibration isolator |
DE09169360T1 (de) | 2002-09-24 | 2010-12-09 | Bell Helicopter Textron, Inc., Fort Worth | Ein Verfahren zur Regelung der akustischen Strahlung eines Schiffs |
US6758466B2 (en) * | 2002-11-06 | 2004-07-06 | Lord Corporation | Fluid-elastomeric damper assembly including internal pumping mechanism |
US7270321B2 (en) * | 2002-11-06 | 2007-09-18 | Lord Corporation | Fluid-elastomeric damper assembly including internal pumping mechanism |
US20040134733A1 (en) * | 2003-01-13 | 2004-07-15 | Wood James Gary | Vibration absorber |
US20050077845A1 (en) * | 2003-08-29 | 2005-04-14 | Nejat Olgac | Actively controlled harmonic force generator |
JP2005212008A (ja) * | 2004-01-28 | 2005-08-11 | Hitachi Via Mechanics Ltd | アクティブマスダンパ |
US20050217954A1 (en) * | 2004-03-31 | 2005-10-06 | Hindle Timothy A | Viscous isolation and damping strut utilizing a fluid mass effect |
US8113321B2 (en) * | 2006-05-06 | 2012-02-14 | Lord Corporation | Helicopter reduced vibration isolator axial support strut |
CN101522521B (zh) * | 2006-10-12 | 2013-06-12 | 贝尔直升机泰克斯特龙公司 | 硬安装的减震塔架 |
CN101657353A (zh) * | 2007-04-11 | 2010-02-24 | 贝尔直升机泰克斯特龙公司 | 斜旋翼飞行器上抑制振动和声学标记的方法 |
CN101809354B (zh) * | 2007-09-27 | 2012-09-05 | 贝尔直升机泰克斯特龙公司 | 用于改善振动隔离的方法和装置 |
WO2010071649A1 (en) * | 2008-12-18 | 2010-06-24 | Bell Helicopter Textron Inc. | Method and apparatus for improved vibration isolation |
EP2406518B1 (en) | 2009-03-12 | 2014-07-02 | Bell Helicopter Textron Inc. | Method and apparatus for improved vibration isolation |
US20110017562A1 (en) * | 2009-07-21 | 2011-01-27 | Hapco Aluminum Pole Products | Vibration damping system for utility poles |
CA2780953C (en) | 2009-12-01 | 2015-02-24 | Bell Helicopter Textron Inc. | Apparatus for improved vibration isolation |
US8684340B2 (en) | 2010-02-16 | 2014-04-01 | Textron Innovations Inc. | Variable stiffness liquid inertia vibration eliminator |
DE102010021241A1 (de) * | 2010-05-21 | 2011-11-24 | Oerlikon Leybold Vacuum Gmbh | Vakuumpumpe |
WO2012141676A1 (en) * | 2011-04-11 | 2012-10-18 | Bell Helicopter Textron Inc. | Pylon mounting system with vibration isolation |
US8882091B2 (en) | 2011-11-11 | 2014-11-11 | Textron Innovations Inc. | Vibration isolation system |
US20130161884A1 (en) * | 2011-12-26 | 2013-06-27 | Bell Helicopter Textron Inc. | System and Method of Tuning a Liquid Inertia Vibration Eliminator |
US8672262B2 (en) * | 2012-01-10 | 2014-03-18 | Textron Innovations Inc. | Mechanically optimized liquid inertia vibration eliminator and aircraft pylon system |
US9777788B2 (en) * | 2012-01-10 | 2017-10-03 | Bell Helicopter Textron Inc. | Rotorcraft vibration suppression system in a four corner pylon mount configuration |
US8622375B2 (en) | 2012-03-16 | 2014-01-07 | Textron Innovations Inc. | Dual frequency damper for an aircraft |
US8731743B2 (en) | 2012-04-11 | 2014-05-20 | Textron Innovations Inc. | Self tuning vibration isolation system |
US9296476B2 (en) | 2012-04-18 | 2016-03-29 | Textron Innovations Inc. | Self tuning vibration absorber |
US9133903B2 (en) * | 2013-03-15 | 2015-09-15 | The Pullman Company | Hydroelastic fluids for fluid filled elastomeric damping devices |
US9145946B2 (en) | 2013-03-15 | 2015-09-29 | Bell Helicopter Textron Inc. | Active vibration isolation system |
US9249856B1 (en) | 2014-03-18 | 2016-02-02 | Bell Helicopter Textron Inc. | Liquid inertia vibration mount |
US9551393B2 (en) | 2014-04-23 | 2017-01-24 | Bell Helicopter Textron Inc. | Rotorcraft vibration isolation systems |
ES2891084T3 (es) * | 2016-04-27 | 2022-01-26 | MTU Aero Engines AG | Conjunto de paletas de turbomaquinaria |
US10550907B2 (en) * | 2016-08-18 | 2020-02-04 | Textron Innovations Inc. | Liquid inertia vibration elimination system |
US10301010B2 (en) | 2016-10-20 | 2019-05-28 | Bell Helicopter Textron Inc. | Oscillating pump systems for use on aircraft |
US20180265186A1 (en) | 2017-03-15 | 2018-09-20 | Bell Helicopter Textron Inc. | Vibration Isolation Systems for Advancing Blade Concept Rotorcraft |
US11932380B2 (en) | 2017-03-15 | 2024-03-19 | Textron Innovations Inc. | Vibration isolation systems for compound helicopters |
CN107654566B (zh) * | 2017-08-07 | 2019-10-08 | 上海交通大学 | 参数可调的液弹式隔振装置 |
US11167842B2 (en) * | 2017-10-10 | 2021-11-09 | Bell Helicopter Textron Inc. | Mount for supporting a component and attenuating noise |
US11131363B2 (en) * | 2017-10-16 | 2021-09-28 | Textron Innovations Inc. | Vibration attenuating fluid mount with partitioned compensator |
US11008092B2 (en) | 2017-10-27 | 2021-05-18 | Textron Innovations Inc. | Compact design of a liquid inertia vibration elimination system |
ES2742448B2 (es) * | 2018-08-14 | 2021-11-03 | Garcia Jasiel Najera | Amortiguador con regulación de carga en función de la frecuencia mediante inercia hidráulica |
US11584519B2 (en) | 2019-04-12 | 2023-02-21 | Textron Innovations Inc. | Oscillatory pumping system for liquid vibration isolator |
US11530032B2 (en) | 2019-09-30 | 2022-12-20 | Textron Innovations Inc. | Dynamically isolated pylon |
US11440648B2 (en) | 2020-04-22 | 2022-09-13 | Textron Innovations Inc. | Compact vibration isolation systems for aircraft |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1067263B (US20110009641A1-20110113-C00116.png) * | ||||
US3091307A (en) * | 1961-10-16 | 1963-05-28 | Univ Kansas State | Impact vibration damper and control means therefor |
FR2060392A2 (US20110009641A1-20110113-C00116.png) * | 1969-09-04 | 1971-06-18 | Ahex Corp |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1744332A (en) * | 1926-12-06 | 1930-01-21 | Studebaker Corp | Automobile construction |
US1833751A (en) * | 1929-07-05 | 1931-11-24 | Gen Electric | Vibration damping device |
GB545671A (en) * | 1940-01-10 | 1942-06-08 | Westinghouse Electric Int Co | Improvements in or relating to hydraulic damping devices |
FR942806A (fr) * | 1946-04-15 | 1949-02-18 | Dispositif de fixation ou de support anti-vibratoire | |
GB734097A (en) * | 1951-08-27 | 1955-07-27 | Kronprinz Ag | An improved spring suspension for telescopic forks for motor cycles |
GB771663A (en) * | 1954-11-01 | 1957-04-03 | Gen Motors Corp | Improved vehicle suspension system |
GB920586A (en) * | 1960-09-21 | 1963-03-06 | Bourcier Carbon Christian | Improvements in or relating to pneumatic shock absorbers |
US3173514A (en) * | 1961-10-04 | 1965-03-16 | Univ Kansas State | Impact vibration damper |
GB1035623A (en) * | 1961-11-07 | 1966-07-13 | Girling Ltd | Improvements in or relating to shock damper systems for road vehicles |
US3658314A (en) * | 1969-08-18 | 1972-04-25 | Clevite Corp | Elastomeric fluid shock absorber |
FR2194266A5 (US20110009641A1-20110113-C00116.png) * | 1972-07-26 | 1974-02-22 | Commissariat Energie Atomique | |
GB1433772A (en) * | 1973-01-16 | 1976-04-28 | Elliott Brothers London Ltd | Anti-vibration mountings |
FR2430546A1 (fr) * | 1978-07-03 | 1980-02-01 | Chrysler France | Dispositif de suspension perfectionne |
-
1979
- 1979-02-26 US US06/015,230 patent/US4236607A/en not_active Expired - Lifetime
-
1980
- 1980-02-22 DE DE19803006778 patent/DE3006778A1/de active Granted
- 1980-02-22 GB GB8005966A patent/GB2051301B/en not_active Expired
- 1980-02-24 IL IL59459A patent/IL59459A/xx not_active IP Right Cessation
- 1980-02-25 AR AR280085A patent/AR221527A1/es active
- 1980-02-25 IT IT47999/80A patent/IT1147038B/it active
- 1980-02-25 CA CA000346358A patent/CA1134870A/en not_active Expired
- 1980-02-25 AU AU55854/80A patent/AU531620B2/en not_active Ceased
- 1980-02-26 FR FR8004155A patent/FR2449826B1/fr not_active Expired
- 1980-02-26 ES ES488949A patent/ES488949A1/es not_active Expired
- 1980-02-26 JP JP2235380A patent/JPS55159348A/ja active Granted
- 1980-02-26 MX MX808670U patent/MX6706E/es unknown
- 1980-02-26 BR BR8001118A patent/BR8001118A/pt not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1067263B (US20110009641A1-20110113-C00116.png) * | ||||
US3091307A (en) * | 1961-10-16 | 1963-05-28 | Univ Kansas State | Impact vibration damper and control means therefor |
FR2060392A2 (US20110009641A1-20110113-C00116.png) * | 1969-09-04 | 1971-06-18 | Ahex Corp |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10214325A1 (de) * | 2002-03-28 | 2003-10-16 | Zf Lemfoerder Metallwaren Ag | Verfahren zum Betreiben eines Hydrolagers und hierfür ausgebildetes Lager |
Also Published As
Publication number | Publication date |
---|---|
IT1147038B (it) | 1986-11-19 |
FR2449826A1 (fr) | 1980-09-19 |
AU531620B2 (en) | 1983-09-01 |
GB2051301A (en) | 1981-01-14 |
CA1134870A (en) | 1982-11-02 |
FR2449826B1 (fr) | 1986-09-26 |
MX6706E (es) | 1985-10-23 |
IL59459A0 (en) | 1980-05-30 |
JPS55159348A (en) | 1980-12-11 |
BR8001118A (pt) | 1980-10-29 |
AU5585480A (en) | 1980-09-04 |
GB2051301B (en) | 1983-06-15 |
JPS6329136B2 (US20110009641A1-20110113-C00116.png) | 1988-06-13 |
IT8047999A0 (it) | 1980-02-25 |
ES488949A1 (es) | 1980-09-16 |
US4236607A (en) | 1980-12-02 |
DE3006778C2 (US20110009641A1-20110113-C00116.png) | 1989-08-17 |
AR221527A1 (es) | 1981-02-13 |
IL59459A (en) | 1983-03-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8128 | New person/name/address of the agent |
Representative=s name: FRHR. VON UEXKUELL, J., DIPL.-CHEM. DR.RER.NAT. GR |
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D2 | Grant after examination | ||
8364 | No opposition during term of opposition |