DE4307633C1 - Schraube zum Festlegen eines Markraumnagels - Google Patents

Schraube zum Festlegen eines Markraumnagels

Info

Publication number
DE4307633C1
DE4307633C1 DE4307633A DE4307633A DE4307633C1 DE 4307633 C1 DE4307633 C1 DE 4307633C1 DE 4307633 A DE4307633 A DE 4307633A DE 4307633 A DE4307633 A DE 4307633A DE 4307633 C1 DE4307633 C1 DE 4307633C1
Authority
DE
Germany
Prior art keywords
screw
thread
head
shank
screw head
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.)
Expired - Fee Related
Application number
DE4307633A
Other languages
German (de)
English (en)
Inventor
Dietmar Dr Med Pennig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE4307633A priority Critical patent/DE4307633C1/de
Priority to US08/171,274 priority patent/US5375956A/en
Priority to TW083101625A priority patent/TW288969B/zh
Priority to JP6519451A priority patent/JP2553323B2/ja
Priority to DE59400279T priority patent/DE59400279D1/de
Priority to AT94908948T priority patent/ATE137949T1/de
Priority to CN94190040A priority patent/CN1042793C/zh
Priority to PCT/DE1994/000228 priority patent/WO1994020039A1/de
Priority to ES94908948T priority patent/ES2088319T3/es
Priority to EP94908948A priority patent/EP0639955B1/de
Priority to KR1019940704004A priority patent/KR0167627B1/ko
Priority to AU73460/94A priority patent/AU668657B2/en
Priority to CA002116918A priority patent/CA2116918C/en
Priority to TR00273/94A priority patent/TR27714A/xx
Priority to ZA941669A priority patent/ZA941669B/xx
Application granted granted Critical
Publication of DE4307633C1 publication Critical patent/DE4307633C1/de
Priority to NO943306A priority patent/NO179535C/no
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0084—Specially shaped nuts or heads of bolts or screws for rotations by a tool with a threaded engagement between the head of the bolt or screw and the tool
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8605—Heads, i.e. proximal ends projecting from bone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A61B17/863—Shanks, i.e. parts contacting bone tissue with thread interrupted or changing its form along shank, other than constant taper
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8875—Screwdrivers, spanners or wrenches
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S606/00—Surgery
    • Y10S606/916—Tool for installing or removing orthopedic fastener

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Neurology (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)
  • Materials For Medical Uses (AREA)
  • Dowels (AREA)
  • Connection Of Plates (AREA)
  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
  • Adornments (AREA)
  • Clamps And Clips (AREA)
  • Joining Of Building Structures In Genera (AREA)
DE4307633A 1993-03-11 1993-03-11 Schraube zum Festlegen eines Markraumnagels Expired - Fee Related DE4307633C1 (de)

Priority Applications (16)

Application Number Priority Date Filing Date Title
DE4307633A DE4307633C1 (de) 1993-03-11 1993-03-11 Schraube zum Festlegen eines Markraumnagels
US08/171,274 US5375956A (en) 1993-03-11 1993-12-21 Head screw construction for use in fixing the position of an intramedullary nail
TW083101625A TW288969B (enExample) 1993-03-11 1994-02-25
EP94908948A EP0639955B1 (de) 1993-03-11 1994-03-01 Schraube zum festlegen eines markraumnagels
AT94908948T ATE137949T1 (de) 1993-03-11 1994-03-01 Schraube zum festlegen eines markraumnagels
CN94190040A CN1042793C (zh) 1993-03-11 1994-03-01 用于固定骨髓钉的螺杆
PCT/DE1994/000228 WO1994020039A1 (de) 1993-03-11 1994-03-01 Schraube zum festlegen eines markraumnagels
ES94908948T ES2088319T3 (es) 1993-03-11 1994-03-01 Tornillo para fijar un clavo intramedular.
JP6519451A JP2553323B2 (ja) 1993-03-11 1994-03-01 髄内釘を固定するためのねじ
KR1019940704004A KR0167627B1 (ko) 1993-03-11 1994-03-01 골수내에 못을 고정시키기 위한 나사
AU73460/94A AU668657B2 (en) 1993-03-11 1994-03-01 Screw for securing an intramedullary nail
DE59400279T DE59400279D1 (de) 1993-03-11 1994-03-01 Schraube zum festlegen eines markraumnagels
CA002116918A CA2116918C (en) 1993-03-11 1994-03-03 Headed screw construction for use in fixing the position of an intramedullary nail
TR00273/94A TR27714A (tr) 1993-03-11 1994-03-09 Bir isaret (mark) yivi piminin tespitine iliskin vida.
ZA941669A ZA941669B (en) 1993-03-11 1994-03-10 Screw for fixing a bone-cavity pin
NO943306A NO179535C (no) 1993-03-11 1994-09-07 Skrue for feste av en margromnagle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4307633A DE4307633C1 (de) 1993-03-11 1993-03-11 Schraube zum Festlegen eines Markraumnagels

Publications (1)

Publication Number Publication Date
DE4307633C1 true DE4307633C1 (de) 1994-05-19

Family

ID=6482466

Family Applications (2)

Application Number Title Priority Date Filing Date
DE4307633A Expired - Fee Related DE4307633C1 (de) 1993-03-11 1993-03-11 Schraube zum Festlegen eines Markraumnagels
DE59400279T Expired - Lifetime DE59400279D1 (de) 1993-03-11 1994-03-01 Schraube zum festlegen eines markraumnagels

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE59400279T Expired - Lifetime DE59400279D1 (de) 1993-03-11 1994-03-01 Schraube zum festlegen eines markraumnagels

Country Status (15)

Country Link
US (1) US5375956A (enExample)
EP (1) EP0639955B1 (enExample)
JP (1) JP2553323B2 (enExample)
KR (1) KR0167627B1 (enExample)
CN (1) CN1042793C (enExample)
AT (1) ATE137949T1 (enExample)
AU (1) AU668657B2 (enExample)
CA (1) CA2116918C (enExample)
DE (2) DE4307633C1 (enExample)
ES (1) ES2088319T3 (enExample)
NO (1) NO179535C (enExample)
TR (1) TR27714A (enExample)
TW (1) TW288969B (enExample)
WO (1) WO1994020039A1 (enExample)
ZA (1) ZA941669B (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999057446A1 (de) * 1998-04-30 1999-11-11 Loeffler Thomas Verfahren und vorrichtung zum herstellen und prüfen von schraubverbindungen
DE19831336A1 (de) * 1998-07-13 2000-02-03 Otg St Gallen Ag St Gallen Knochenschraube, insbesondere für den Einsatz bei translaminärer Wirbelverschraubung

Families Citing this family (65)

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US5665087A (en) * 1996-03-26 1997-09-09 Huebner; Randall J. Method and screw for repair of olecranon fractures
NO179773C (no) * 1994-03-14 1996-12-18 Espen Haukeland Fjernbar, ortopedisk brudd-stabilisator
US5536127A (en) * 1994-10-13 1996-07-16 Pennig; Dietmar Headed screw construction for use in fixing the position of an intramedullary nail
US5681135A (en) * 1995-01-19 1997-10-28 Simonson; Peter Melott Threaded fastener with multi-stage torque limiting applicator
US5607432A (en) * 1995-01-23 1997-03-04 Linvatec Corporation Threaded suture anchor retriever
WO1996039974A1 (en) * 1995-06-07 1996-12-19 Implex Corporation Femoral head core channel filling prosthesis
US5643264A (en) * 1995-09-13 1997-07-01 Danek Medical, Inc. Iliac screw
US8343186B2 (en) 2004-04-06 2013-01-01 Arthrex, Inc. Fully threaded suture anchor with transverse anchor pin
US9521999B2 (en) 2005-09-13 2016-12-20 Arthrex, Inc. Fully-threaded bioabsorbable suture anchor
US8821541B2 (en) 1999-02-02 2014-09-02 Arthrex, Inc. Suture anchor with insert-molded rigid member
DE29913994U1 (de) * 1999-08-11 2000-12-21 Synthes AG Chur, Chur, Graubünden Chirurgische Führungsplatte
US7993369B2 (en) 2000-06-22 2011-08-09 Arthrex, Inc. Graft fixation using a plug against suture
US6527775B1 (en) 2000-09-22 2003-03-04 Piper Medical, Inc. Intramedullary interlocking fixation device for the distal radius
US6866666B1 (en) * 2001-06-28 2005-03-15 Medicinelodge, Inc. System and method for attaching soft tissue to bone
ES2260169T3 (es) * 2001-12-04 2006-11-01 Synthes Ag Chur Tornillo osteologico.
RU2277392C2 (ru) * 2001-12-04 2006-06-10 Синтез Аг Чур Костный винт и устройство для вправления, сжатия и фиксации костных фрагментов
US8216243B2 (en) 2001-12-04 2012-07-10 Synthes Usa, Llc Headless compression screw with integrated reduction-compression instrument
US6641586B2 (en) * 2002-02-01 2003-11-04 Depuy Acromed, Inc. Closure system for spinal fixation instrumentation
WO2003103507A2 (en) * 2002-06-11 2003-12-18 Tyco Healthcare Group, Lp Hernia mesh tacks
US7004947B2 (en) 2002-06-24 2006-02-28 Endius Incorporated Surgical instrument for moving vertebrae
US6648888B1 (en) 2002-09-06 2003-11-18 Endius Incorporated Surgical instrument for moving a vertebra
US7207248B2 (en) * 2003-10-09 2007-04-24 Illinois Tool Works Inc. Threaded screw fastener characterized by high pull-out resistance, reduced installation torque, and unique head structure and drive socket implement or tool therefor
US7766968B2 (en) * 2003-12-08 2010-08-03 Sweeney Patrick J Modular cannulated total joint prosthesis
US20050149030A1 (en) * 2003-12-19 2005-07-07 Depuy Spine, Inc. Facet joint fixation system
US10478179B2 (en) * 2004-04-27 2019-11-19 Covidien Lp Absorbable fastener for hernia mesh fixation
US7819873B1 (en) * 2004-09-21 2010-10-26 Biomet Manufacturing Corp. Method and apparatus for fixation of surgical instruments
US7582093B2 (en) * 2005-04-26 2009-09-01 Amei Technologies, Inc. Screw extraction and insertion device
CN100507287C (zh) * 2007-02-09 2009-07-01 陈伟明 一种防盗螺栓和与其配套的专用扳手
JP5205104B2 (ja) * 2008-03-29 2013-06-05 利夫 北野 骨接合用スクリュー
ES2447941T3 (es) * 2009-02-26 2014-03-13 Nobel Biocare Services Ag Conjunto de implante dental
US20100256688A1 (en) 2009-04-03 2010-10-07 Stryker Trauma Gmbh Sonic screw
BRPI1010924A2 (pt) * 2009-05-20 2019-01-08 Synthes Gmbh retração montada em pacientes
US8496692B2 (en) 2009-09-21 2013-07-30 Jmea Corporation Locking securing member
BR112012011667B1 (pt) * 2009-11-17 2020-10-20 Synthes Gmbh combinação de um pino contraforte e um implante a ser fixado em um osso através do pino contraforte
US8206186B2 (en) * 2009-12-10 2012-06-26 Westinghouse Electric Co. Llc Electrical connector assembly, test lead assembly therefor, and associated method
US8535318B2 (en) 2010-04-23 2013-09-17 DePuy Synthes Products, LLC Minimally invasive instrument set, devices and related methods
US8945193B2 (en) * 2010-07-20 2015-02-03 X-Spine Systems, Inc. Minimally invasive spinal facet compression screw and system for bone joint fusion and fixation
EP2595556A1 (en) * 2010-07-20 2013-05-29 X-spine Systems, Inc. Spinal facet compression screw with variable pitch thread zones and buttress head
DE102010055433B4 (de) * 2010-12-10 2014-07-24 Celgen Ag Knochenschraube und Vorrichtung zur Knochendistraktion
CA2829565A1 (en) * 2011-03-10 2012-09-13 DePuy Synthes Products, LLC Awl screw fixation members and related systems
CN103813761B (zh) 2011-07-20 2017-02-08 迈克尔·H·霍维茨 微小切口可移除骨螺钉、驱动件及使用方法
US20130072990A1 (en) * 2011-09-19 2013-03-21 Peter Melott Simonson Reverse thread bone screw
ES2558083T3 (es) * 2011-09-30 2016-02-01 Biedermann Technologies Gmbh & Co. Kg Dispositivo de anclaje de hueso y herramienta que coopera con dicho dispositivo de anclaje de hueso
AU2012372783B2 (en) * 2012-03-08 2017-11-23 Trimed Inc. System and method for treating bone fractures
EP2674127B1 (de) * 2012-06-13 2014-12-17 maxon motor ag Implantat
US9687284B2 (en) 2013-02-13 2017-06-27 Stryker European Holdings I, Llc Locking peg with extended thread
US9404525B2 (en) 2013-03-14 2016-08-02 Imds Llc Polyaxial locking interface
US9103367B2 (en) * 2013-03-14 2015-08-11 Imds Llc Polyaxial locking interface
US12404888B2 (en) * 2014-07-10 2025-09-02 Pmc Industries, Inc. Clamp assembly using pins
ES2562995B1 (es) * 2014-08-08 2016-12-19 Fulgencio PALAZÓN MARTÍNEZ Sistema de llave y tornillo o tuerca de seguridad y procedimiento para utilización de dicho sistema
US9936990B2 (en) 2015-02-17 2018-04-10 Biomet C.V. Bone peg having improved extraction
EP3278750B1 (en) 2016-08-04 2018-12-12 Biedermann Technologies GmbH & Co. KG Polyaxial bone anchoring device and system of an instrument and a polyaxial bone anchoring device
US10479673B2 (en) * 2016-08-12 2019-11-19 Charles R. S. Wood Saddle bag connector
EP3287089B1 (en) 2016-08-24 2019-07-24 Biedermann Technologies GmbH & Co. KG Polyaxial bone anchoring device and system of an instrument and a polyaxial bone anchoring device
GB2554884B (en) * 2016-10-12 2020-09-09 Kwikbolt Ltd Assisted removal fastener
US10426535B2 (en) * 2017-01-05 2019-10-01 Stryker European Holdings I, Llc Self-holding screw head
US20180353227A1 (en) * 2017-06-07 2018-12-13 Clarkson University Adjustable length orthopedic device
EP3476340B1 (en) 2017-10-25 2021-06-02 Biedermann Technologies GmbH & Co. KG Polyaxial bone anchoring device
EP3536271B1 (en) 2018-03-06 2022-05-04 Biedermann Technologies GmbH & Co. KG Polyaxial bone anchoring device and system of an instrument and a polyaxial bone anchoring device
EP3781057A1 (en) 2018-04-18 2021-02-24 GLW, Inc. Removable orthopedic screws
IT201800006879A1 (it) * 2018-07-03 2020-01-03 Kit perfezionato per l’ortopedia, preferibilmente per l’osteosintesi.
US11202663B2 (en) 2019-02-13 2021-12-21 Globus Medical, Inc. Proximal humeral stabilization systems and methods thereof
WO2021021558A1 (en) 2019-07-26 2021-02-04 Virkus Walter Warren Intramedullary rod with intrabody outrigger interface
CN114587464B (zh) * 2022-01-27 2024-06-07 上海交通大学医学院附属瑞金医院 一种能够结合内固定板固定肌腱的螺钉
US11679005B1 (en) * 2022-05-26 2023-06-20 Spinal Simplicity, Llc Implant removal tool

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463753A (en) * 1980-01-04 1984-08-07 Gustilo Ramon B Compression bone screw
DE3725111A1 (de) * 1987-07-29 1989-02-09 Aesculap Werke Ag Markraumnagel, insbesondere verriegelungsnagel
EP0306709A2 (de) * 1987-09-05 1989-03-15 Hermann Heinrich Michael Dauerer Markraum-Verriegelungsnagel
DE3928460A1 (de) * 1988-12-27 1990-06-28 Medizin Labortechnik Veb K Markraum-verriegelungsnagel

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Publication number Priority date Publication date Assignee Title
US4463753A (en) * 1980-01-04 1984-08-07 Gustilo Ramon B Compression bone screw
DE3725111A1 (de) * 1987-07-29 1989-02-09 Aesculap Werke Ag Markraumnagel, insbesondere verriegelungsnagel
EP0306709A2 (de) * 1987-09-05 1989-03-15 Hermann Heinrich Michael Dauerer Markraum-Verriegelungsnagel
DE3928460A1 (de) * 1988-12-27 1990-06-28 Medizin Labortechnik Veb K Markraum-verriegelungsnagel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999057446A1 (de) * 1998-04-30 1999-11-11 Loeffler Thomas Verfahren und vorrichtung zum herstellen und prüfen von schraubverbindungen
DE19980796B4 (de) * 1998-04-30 2011-07-07 Löffler, Thomas, Dipl.-Ing. Dr., 83714 Verfahren und Vorrichtung zum Herstellen und Prüfen von Schraubverbindungen
DE19831336A1 (de) * 1998-07-13 2000-02-03 Otg St Gallen Ag St Gallen Knochenschraube, insbesondere für den Einsatz bei translaminärer Wirbelverschraubung
DE19831336C2 (de) * 1998-07-13 2003-06-18 Sepitec Foundation Vaduz Knochenschraube, insbesondere für den Einsatz bei translaminärer Wirbelverschraubung

Also Published As

Publication number Publication date
TR27714A (tr) 1995-06-22
KR950701504A (ko) 1995-04-28
KR0167627B1 (ko) 1999-01-15
TW288969B (enExample) 1996-10-21
CN1102037A (zh) 1995-04-26
ZA941669B (en) 1994-10-12
AU668657B2 (en) 1996-05-09
ATE137949T1 (de) 1996-06-15
NO943306D0 (no) 1994-09-07
AU7346094A (en) 1994-09-26
WO1994020039A1 (de) 1994-09-15
EP0639955A1 (de) 1995-03-01
CN1042793C (zh) 1999-04-07
NO943306L (no) 1994-09-15
NO179535C (no) 1996-10-23
EP0639955B1 (de) 1996-05-15
JP2553323B2 (ja) 1996-11-13
US5375956A (en) 1994-12-27
CA2116918A1 (en) 1994-09-12
DE59400279D1 (de) 1996-06-20
ES2088319T3 (es) 1996-08-01
NO179535B (no) 1996-07-15
JPH07505567A (ja) 1995-06-22
CA2116918C (en) 2004-02-17

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