Source: https://patents.google.com/patent/US5282870A/en
Timestamp: 2019-11-17 06:31:42
Document Index: 768761853

Matched Legal Cases: ['art 1', 'art 2', 'art 1', 'art 2', 'art 1', 'art 2', 'art 2', 'art 1', 'art 2', 'art 2', 'art 1', 'art 1', 'art 2', 'art 2', 'art 2', 'art\n1']

US5282870A - Artificial knee joint - Google Patents
Artificial knee joint Download PDF
US5282870A
US5282870A US07/976,234 US97623492A US5282870A US 5282870 A US5282870 A US 5282870A US 97623492 A US97623492 A US 97623492A US 5282870 A US5282870 A US 5282870A
US07/976,234
GROUPE POUR L'UTILISATION ET L'ETUDE DES PROTHESES ARTICULAIRES
Sulzer Medizinaltechnik AG
1992-01-14 Priority to CH8892A priority Critical patent/CH686611A5/en
1992-01-14 Priority to CH00088/92 priority
1992-11-13 Assigned to SULZER MEDIZINALTECHNIK AG, PROTEX AG reassignment SULZER MEDIZINALTECHNIK AG ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MOSER, WALTER, WILLI, ROLAND
1992-11-13 Application filed by Sulzer Medizinaltechnik AG filed Critical Sulzer Medizinaltechnik AG
1994-02-01 Application granted granted Critical
1994-02-01 Publication of US5282870A publication Critical patent/US5282870A/en
2005-06-08 Assigned to SULZER ORTHOPEDICS LTD. reassignment SULZER ORTHOPEDICS LTD. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: ALLO PRO A.G.
2005-06-08 Assigned to ZIMMER SCHWEIZ HOLDINGS AG reassignment ZIMMER SCHWEIZ HOLDINGS AG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: CENTERPULSE AG
2005-06-08 Assigned to CENTERPULSE AG reassignment CENTERPULSE AG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SULZER MEDICA A.G.
2005-06-08 Assigned to SULZER MEDICA A.G. reassignment SULZER MEDICA A.G. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SULZER ORTHOPEDICS LTD.
2005-06-08 Assigned to ALLO PRO A.G. reassignment ALLO PRO A.G. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: PROTEK A.G., SULZER MEDIZINAL TECHNIK A.G.
2005-06-13 Assigned to GROUPE POUR L'UTILISATION ET L'ETUDE DES PROTHÈSES ARTICULAIRES reassignment GROUPE POUR L'UTILISATION ET L'ETUDE DES PROTHÈSES ARTICULAIRES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZIMMER GMBH
2005-06-13 Assigned to ZIMMER GMBH reassignment ZIMMER GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZIMMER SCHWEIZ HOLDINGS AG
2005-08-09 Assigned to GROUPE POUR L'UTILISATION ET L'ETUDE DES PROTHÈSES ARTICULAIRES reassignment GROUPE POUR L'UTILISATION ET L'ETUDE DES PROTHÈSES ARTICULAIRES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZIMMER GMBH
2012-11-13 Anticipated expiration legal-status Critical
238000005096 rolling process Methods 0 abstract claims description 4
210000000629 knee joint Anatomy 0 abstract title 2
An artificial knee joint has a convex femoral part (1) and tibial part (2). At the femoral part (1), which has smaller radii of curvature as bending increases, the tibial part (2) performs a rolling and sliding movement, with the femoral part (1) and the tibial part (2) each comprising a lateral guide surface (F2, F2 ') and a medial guide surface (F1, F1 '). The medial guide surface (F1 ') of the tibial part (2) forms a flat guide plane, which with different flex angles, abuts cylindrical guide surfaces (F1) of the femoral part (1) with line contact, while the lateral guide surface (F2 ') of the tibial part is trapped by the lateral condyle with different bending angles in the frontal plane in the lateral direction by line contact along circular segments having the same radius of curvature (R3). The value of this same radius of curvature (R3) lies between the smallest and largest flex radius (Rn) of the lateral condyle in the track (7).
The invention relates to an artificial knee joint consisting of a convex femoral part and tibial part, which performs a rolling and sliding movement at the femoral part, which comprises smaller radii of curvature as flexing increases, with the femoral part and tibial part respectively comprising a lateral guide surface and a medial guide surface.
A knee joint prosthesis having a convex femoral part and having concave guide surfaces on the tibial part is shown in U.S. Pat. No. 4,568,348. This arrangement has the disadvantage that the guidance of the tibial part on a plane perpendicular to the flex axis is restricted on the femoral part by lateral guide shoulders and concave guide surfaces on the tibial part abutting lateral guide shoulders and convex guide surface of the femoral part.
The invention remedies this by emulating as far as possible the anatomical function of a natural knee joint.
The advantages of the invention lie in that the rear cruciate ligament is retained because of its anatomical function and in that, as in a natural knee, a slight torsion in the shaft axis against a constantly increasing resistance
FIG. 1 is a front elevational view of a femoral part and section through the guide surfaces of the tibial part guided at the femoral part;
FIG. 2 is a fragmentary detail, in section, of the femoral and tibial parts shown in FIG. 1 in mutual contact
FIG. 3 is a plan view of the guide surfaces of the tibial part; and
FIG. 4 is a sagittal section through a tibial part corresponding to the one shown in FIG. 1 and is taken on line IV--IV of FIG. 3.
The invention shows an artificial knee joint, which consists of a convex femoral part 1 and of a tibial part 2. At the femoral part 1, which comprises smaller radii of curvature as the degree of flexure at the knee increases, the tibial part 2 performs a rolling and sliding movement. The femoral part 1 and the tibial part 2 each has a lateral guide surface F2, F2 ' and a medial guide surface F1, F1 '. The medial guide surface F1 ' of the tibial part 2 forms a flat guide plane, which at different flexure angles abuts cylindrical guide surfaces F1 of the femoral part 1 with line contact, while the lateral guide surface F2 ' of the tibial part is trapped by the lateral condyle with different flexure angles in the frontal plane by line contact on circular segments having the same radius of curvature R3 and forms a track 7 in a plane parallel to the medial guide surface F1'. In this case the magnitude of this same radius of curvature R3 lies between the smallest and largest bending radius Rn of the lateral condyle in track 7.
As shown in FIG. 1 the medial guide surface F1 ' of the tibial part is a plane surface, which is perpendicular to the tibia axis 3, while the track 7 of the lateral guide surface F2 ' also lies in a plane perpendicular to the tibia axis 3 and in this plane comprises a curvature by a critical angle 8 of 20° in the lateral direction so as to enable an internal rotation of the tibial part 2 about the tibia axis 3. The generatrix for the lateral guide surfaces is a segment of a circle with a radius R3, which in the case of the tibial part 2 is guided along the track 7 and which in the case of the femoral part 1 for a determined angle of flexure comprises the same axis of rotation 5 for its radius Rn, which follows track 7, and also for its general points with radius R2, as the medial guide surface F1 with radius R1.
On the tibia side a type of eminentia is formed in a transition zone 4 between the limit points A, A' of the medial guide and the limit points B, B' of the lateral zone. Here the gradient constantly changes from the medial to the lateral direction, so that between femoral part 1 and tibial part 2 a space 6 is produced, which permits relative rotational movement over critical angle 8.
The sagittal section of FIG. 4 shows that the plane F1 and the track 7 lying in a plane parallel thereto progress into a raised edge in the sagittal edge region of the tibial part 2, with the radius of curvature Rs >R1 or Rs >Rn, respectively. This edge region forms a limiting guide for the femoral part 2. The central region provided for the translation does not need to be absolutely flat. It can have a slight curvature with a radius Rs that is a multiple of the radii R1 or Rn of the guide surfaces F1, F2 of the femoral part
1. An artificial knee joint comprising a convex femoral part which comprises smaller radii of curvature as flexure increases (1) and a tibial part (2), which performs a rolling and sliding movement, the femoral part (1) and the tibial part (2) each comprising a lateral guide surface (F2, F2 ') and a medial guide surface (F1, F1 '), the medial guide surface (F1 ') of the tibial part forming a flat guide plane, which at different flex angles abuts cylindrical guide surface (F1) of the femoral part with line contact, the lateral guide surface (F2 ') of the tibial part being trapped by a lateral condyle with different flex angles in a frontal plane through line contact along circular segments having a common radius of curvature (R3) and forming a track (7) in a plane parallel to the medial guide surface (F1 '), a magnitude of the radius of curvature (R3) being between a smallest one and a largest one of radii of curvature (Rn) of the lateral guide surface (F2) in a sagittal plane, with (Rn) being a radius which extends in the track (7), and including a transition zone (4) extending in a transversal direction between the lateral and medial guide surfaces (F2 ', F1 ') of the tibial part (2) with a gradient from an end point (B') of the lateral guide surface to an end point (A') of the medial guide surface forming a continually changing type of eminentia therebetween.
2. An artificial knee joint according to claim 1, wherein the track (7) of the lateral guide surface (F2 ') of the tibial part (2) comprises a curvature about an axis (3), which during relative flexure of the femoral part (1) enables an internal rotation of the tibial part (2) about the axis (3).
3. An artificial knee joint according to claim 2, wherein in a non-twisted position the femoral part (1) is at a distance from the transition zone (4) of the tibial part (2) permitting relative rotational movement of the tibial part (2) about the axis (3) up to a critical angle (8).
4. An artificial knee joint according to claim 3, wherein rotation of the tibial part (2) about the axis (3) is attainable up to a critical angle (8) of 20°.
5. An artificial knee joint according to claim 1, wherein the flat guide plane (F1 ') and the track (7) lying in a parallel plane thereto comprise a slight curvature with a final radius of curvature (Rs) which is a multiple of the radii of curvature (R1, Rn) of the guide surfaces (F1, F2) of the femoral part (1).
6. An artificial knee joint according to claim 5, wherein radii of curvature (Rs) in the sagittal plane decrease towards an edge of the tibial part (2) and are larger than the radii of curvature (R1, Rn) of the guide surfaces.
7. An artificial knee joint comprising a femoral part and a cooperating tibial part, the femoral part and the tibial part each including a lateral guide surface and a medial guide surface, the medial guide surface of the tibial part forming a flat guide plane, the medial guide surface of the femoral part being generally cylindrical and being defined by radii of curvature which decrease as relative flexure between the parts increases so that during flexure of the parts the medial guide surface of the tibial part makes line contact with the cylindrical guide surface of the femoral part, the lateral guide surface of the tibial part being concave and the cooperating lateral guide surface of the femoral part being convex, at different flex angles between the parts the lateral guide surfaces of the parts being in line contact along circular segments having a common radius of curvature and forming a track in a plane parallel to the medial guide surface of the tibial part, the radius of curvature being between a smallest one and a largest one of radii of curvature of the lateral guide surface of the femoral part in a sagittal plane, and a transition zone between the lateral and medial guide surfaces of the tibial part forming a gradient between proximate ends of the lateral guide surface and the medial guide surface to define a continually changing eminentia therebetween which limits relative rotational movements of the parts about a tibial axis of the tibial part.
US07/976,234 1992-01-14 1992-11-13 Artificial knee joint Expired - Lifetime US5282870A (en)
CH8892A CH686611A5 (en) 1992-01-14 1992-01-14 Art Royal knee.
CH00088/92 1992-01-14
US5282870A true US5282870A (en) 1994-02-01
ID=4178989
US07/976,234 Expired - Lifetime US5282870A (en) 1992-01-14 1992-11-13 Artificial knee joint
US (1) US5282870A (en)
EP (1) EP0551791B1 (en)
AT (1) AT147614T (en)
CH (1) CH686611A5 (en)
DE (1) DE59207894D1 (en)
US5549688A (en) * 1994-08-04 1996-08-27 Smith & Nephew Richards Inc. Asymmetric femoral prosthesis
US6406497B2 (en) * 2000-07-19 2002-06-18 Tsunenori Takei Artificial knee joint
US20040186582A1 (en) * 2003-02-25 2004-09-23 Kyocera Corporation Artificial knee joint
US20040191106A1 (en) * 2002-11-08 2004-09-30 Howmedica Osteonics Corp. Laser-produced porous surface
US20050125069A1 (en) * 2002-03-22 2005-06-09 Hjs Gelenk System Gmbh Artificial joint
US6972039B2 (en) 1999-03-01 2005-12-06 Biomet, Inc. Floating bearing knee joint prosthesis with a fixed tibial post
WO2004074094A3 (en) * 2003-02-15 2006-06-29 Robert Geary System and method for aircraft cabin atmospheric composition control
US20060147332A1 (en) * 2004-12-30 2006-07-06 Howmedica Osteonics Corp. Laser-produced porous structure
US7081137B1 (en) * 2003-06-23 2006-07-25 Howmedica Osteonics Corp. Knee prosthesis with extended range of motion
US20080050412A1 (en) * 2006-08-15 2008-02-28 Howmedica Osteonics Corp. Antimicrobial implant
US20100131071A1 (en) * 2001-12-14 2010-05-27 Btg International Limited Tibial component
US20110125275A1 (en) * 2009-11-16 2011-05-26 New York Society For The Ruptured And Crippled Maintaining The Hospital For Special Surgery Prosthetic condylar joints with articulating bearing surfaces having a translating contact point during rotation thereof
US20110125279A1 (en) * 2009-11-16 2011-05-26 New York Society For The Ruptured And Crippled Maintaining The Hospital For Special Surgery Constrained condylar knee device
US20110190898A1 (en) * 2010-01-29 2011-08-04 Lenz Nathaniel M Cruciate-retaining knee prosthesis
US20110208316A1 (en) * 2010-02-19 2011-08-25 Biomet Manufacturing Corp. Latent mobile bearing for prosthetic device
WO2013007747A1 (en) * 2011-07-13 2013-01-17 Zimmer Gmbh Femoral knee prosthesis with diverging lateral condyle
US8568486B2 (en) 2010-07-24 2013-10-29 Zimmer, Inc. Asymmetric tibial components for a knee prosthesis
US8628580B2 (en) 2010-07-24 2014-01-14 Zimmer, Inc. Tibial prosthesis
US8690954B2 (en) 2011-11-18 2014-04-08 Zimmer, Inc. Tibial bearing component for a knee prosthesis with improved articular characteristics
US8758444B2 (en) 2011-11-21 2014-06-24 Zimmer, Inc. Tibial baseplate with asymmetric placement of fixation structures
US9381090B2 (en) 2010-07-24 2016-07-05 Zimmer, Inc. Asymmetric tibial components for a knee prosthesis
CN105748176A (en) * 2016-04-26 2016-07-13 华中科技大学同济医学院附属同济医院 Integrated artificial full knee joint prosthesis
AUPN089495A0 (en) * 1995-02-03 1995-03-02 Denupo Pty. Ltd. Knee prosthesis
AT225637T (en) 1996-09-11 2002-10-15 Plus Endoprothetik Ag Tibia part of a knee joint endoprosthesis
ES2192277T3 (en) 1996-11-21 2003-10-01 Plus Endoprothetik Ag Articular cup for a hip joint endoprosthesis.
DE19716879C2 (en) * 1997-04-22 1999-07-15 Plus Endoprothetik Ag femoral
FR2417293A1 (en) * 1978-02-17 1979-09-14 Helfet Arthur Prothese of intercondylar IMPROVED join
DE3314038A1 (en) * 1982-04-20 1983-10-27 Mecron Med Prod Gmbh Knee prosthesis
EP0021421B1 (en) * 1979-07-02 1984-05-16 Biomedical Engineering Corp. Prosthetic joint
WO1986003117A1 (en) * 1984-11-29 1986-06-05 Lothar Hanslik Knee joint endoprosthesis
1992-01-14 CH CH8892A patent/CH686611A5/en not_active IP Right Cessation
1992-11-13 US US07/976,234 patent/US5282870A/en not_active Expired - Lifetime
1992-12-02 EP EP19920810940 patent/EP0551791B1/en not_active Expired - Lifetime
1992-12-02 DE DE1992507894 patent/DE59207894D1/en not_active Expired - Fee Related
1992-12-02 AT AT92810940T patent/AT147614T/en not_active IP Right Cessation
US5824105A (en) * 1994-08-04 1998-10-20 Smith & Nephew, Inc. Asymmetric femoral prosthesis
US10383738B2 (en) * 1999-06-16 2019-08-20 Btg International Limited Tibial component
US7615082B2 (en) * 2002-03-22 2009-11-10 Hjs Gelenk System Gmbh Artificial joint
US20100042224A1 (en) * 2002-12-20 2010-02-18 Smith & Nephew, Inc. High performance knee prostheses
EP2316385A1 (en) * 2002-12-20 2011-05-04 Smith and Nephew, Inc. High performance knee prostheses
US20110137619A1 (en) * 2002-12-20 2011-06-09 Otto Jason K High Performance Knee Prostheses
US20110125280A1 (en) * 2002-12-20 2011-05-26 Otto Jason K High Performance Knee Prostheses
US20110125281A1 (en) * 2002-12-20 2011-05-26 Otto Jason K High performance knee prostheses
US20110125282A1 (en) * 2002-12-20 2011-05-26 Otto Jason K High Performance Knee Prostheses
US20110130842A1 (en) * 2002-12-20 2011-06-02 Otto Jason K High performance knee prostheses
US20110130841A1 (en) * 2002-12-20 2011-06-02 Otto Jason K High Performance Knee Prostheses
US20110130843A1 (en) * 2002-12-20 2011-06-02 Otto Jason K High performance knee prostheses
US20110137426A1 (en) * 2002-12-20 2011-06-09 Otto Jason K High Performance Knee Prostheses
US20110125283A1 (en) * 2002-12-20 2011-05-26 Otto Jason K High performance knee prostheses
JP2007534530A (en) * 2003-02-15 2007-11-29 ガルフストリーム・エアロスペース・コーポレイションＧｕｌｆｓｔｒｅａｍ Ａｅｒｏｓｐａｃｅ Ｃｏｒｐｏｒａｔｉｏｎ Aircraft cabin air composition control system and method
US7309362B2 (en) * 2003-02-25 2007-12-18 Kyocera Corporation Artificial knee joint
US10398559B2 (en) 2005-12-06 2019-09-03 Howmedica Osteonics Corp. Laser-produced porous surface
US9861490B2 (en) 2010-07-24 2018-01-09 Zimmer, Inc. Asymmetric tibial components for a knee prosthesis
US9918844B2 (en) 2010-07-24 2018-03-20 Zimmer, Inc. Tibial prosthesis with a fixed bearing component
US9763794B2 (en) 2010-07-24 2017-09-19 Zimmer, Inc. Tibial prosthesis
US9192480B2 (en) 2010-07-24 2015-11-24 Zimmer, Inc. Asymmetric tibial components for a knee prosthesis
US9283082B2 (en) 2010-07-24 2016-03-15 Zimmer, Inc. Methods related to seating of bearing component on tibial tray
US9295557B2 (en) 2010-07-24 2016-03-29 Zimmer, Inc. Asymmetric tibial components for a knee prosthesis
US8613775B2 (en) 2010-07-24 2013-12-24 Zimmer, Inc. Asymmetric tibial components for a knee prosthesis
US8574304B2 (en) 2010-07-24 2013-11-05 Zimmer, Inc. Asymmetric tibial components for a knee prosthesis
US9763796B2 (en) 2010-07-24 2017-09-19 Zimmer, Inc. Asymmetric tibial components for a knee prosthesis
US9314343B2 (en) 2010-09-10 2016-04-19 Zimmer, Inc. Motion facilitating tibial components for a knee prosthesis
US10413415B2 (en) 2010-09-10 2019-09-17 Zimmer, Inc. Motion facilitating tibial components for a knee prosthesis
US9763795B2 (en) 2010-09-10 2017-09-19 Zimmer, Inc. Motion facilitating tibial components for a knee prosthesis
US9707085B2 (en) * 2011-07-13 2017-07-18 The General Hospital Corporation Methods and devices for knee joint replacement with anterior cruciate ligament substitution
US20150164646A1 (en) * 2011-07-13 2015-06-18 The General Hospital Corporation Methods and Devices for Knee Joint Replacement with Anterior Cruciate Ligament Substitution
US9662217B2 (en) * 2011-07-13 2017-05-30 Zimmer Gmbh Femoral knee prosthesis with diverging lateral condyle
US20150025644A1 (en) * 2011-07-13 2015-01-22 Zimmer Gmbh Femoral knee prosthesis with diverging lateral condyle
US8858643B2 (en) 2011-11-18 2014-10-14 Zimmer, Inc. Tibial bearing component for a knee prosthesis with improved articular characteristics
US9072607B2 (en) 2011-11-18 2015-07-07 Zimmer, Inc. Tibial bearing component for a knee prosthesis with improved articular characteristics
US9295558B2 (en) 2011-11-18 2016-03-29 Zimmer, Inc. Tibial bearing component for a knee prosthesis with improved articular characteristics
US9655729B2 (en) 2011-11-18 2017-05-23 Zimmer, Inc. Tibial bearing component for a knee prosthesis with improved articular characteristics
US9655728B2 (en) 2011-11-18 2017-05-23 Zimmer, Inc. Tibial bearing component for a knee prosthesis with improved articular characteristics
US9788954B2 (en) 2011-11-18 2017-10-17 Zimmer, Inc. Tibial bearing component for a knee prosthesis with improved articular characteristics
US9186255B2 (en) 2011-11-18 2015-11-17 Zimmer, Inc. Tibial bearing component for a knee prosthesis with improved articular characteristics
US8764838B2 (en) 2011-11-18 2014-07-01 Zimmer, Inc. Tibial bearing component for a knee prosthesis with improved articular characteristics
US9204970B2 (en) 2011-11-18 2015-12-08 Zimmer, Inc. Tibial bearing component for a knee prosthesis with improved articular characteristics
US9925050B2 (en) 2011-11-18 2018-03-27 Zimmer, Inc. Tibial bearing component for a knee prosthesis with improved articular characteristics
US9707089B2 (en) 2011-11-21 2017-07-18 Zimmer, Inc. Tibial baseplate with asymmetric placement of fixation structures
US9308096B2 (en) 2011-11-21 2016-04-12 Zimmer, Inc. Tibial baseplate with asymmetric placement of fixation structures
EP0551791B1 (en) 1997-01-15
DE59207894D1 (en) 1997-02-27
CH686611A5 (en) 1996-05-15
EP0551791A1 (en) 1993-07-21
AT147614T (en) 1997-02-15
Fuss 1989 Anatomy of the cruciate ligaments and their function in extension and flexion of the human knee joint
EP1518521B1 (en) 2010-06-30 Four compartment knee
CA2532877C (en) 2012-10-09 Mobile bearing knee prosthesis
US9788955B2 (en) 2017-10-17 Total knee replacement prosthesis with high order NURBS surfaces
US4770663A (en) 1988-09-13 Knee joint endoprosthesis
AU700844B2 (en) 1999-01-14 Asymmetric femoral prosthesis
US5358530A (en) 1994-10-25 Mobile bearing knee
US6165223A (en) 2000-12-26 Floating bearing knee joint prosthesis with a fixed tibial post
US5824106A (en) 1998-10-20 Ankle prosthesis
US3765033A (en) 1973-10-16 Prosthetic knee joint assembly with mutually slidable and rollable joint sections
US6893467B1 (en) 2005-05-17 Knee prosthesis
CA2237864C (en) 2006-07-11 Orthopaedic implant having an articulating surface with a conforming and translational surface
US5387241A (en) 1995-02-07 Ribbed augment for a prosthetic implant
DE602004013422T2 (en) 2009-07-02 Knee prosthesis
US5738686A (en) 1998-04-14 Artificial joint to replace the human patella
EP1333785B1 (en) 2012-01-04 Floating bearing knee joint prosthesis with a fixed tibial post
EP0626156B1 (en) 1997-07-23 Prosthesis for knee replacement
AU2009202629B2 (en) 2014-10-16 Orthopaedic knee prosthesis having increased axial-rotation
EP1568336B1 (en) 2012-11-14 Joint replacement for a tibial plate
US7878989B2 (en) 2011-02-01 Knee prostheses
Owner name: SULZER MEDIZINALTECHNIK AG, SWITZERLAND
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:MOSER, WALTER;WILLI, ROLAND;REEL/FRAME:006307/0263
Owner name: PROTEX AG, SWITZERLAND
1993-11-18 STCF Information on status: patent grant
Owner name: ALLO PRO A.G., SWITZERLAND
Free format text: MERGER;ASSIGNORS:SULZER MEDIZINAL TECHNIK A.G.;PROTEK A.G.;REEL/FRAME:016105/0074
Owner name: SULZER MEDICA A.G., SWITZERLAND
Free format text: CHANGE OF NAME;ASSIGNOR:SULZER ORTHOPEDICS LTD.;REEL/FRAME:016105/0092
Free format text: CHANGE OF NAME;ASSIGNOR:ALLO PRO A.G.;REEL/FRAME:016105/0083
Owner name: ZIMMER SCHWEIZ HOLDINGS AG, SWITZERLAND
Free format text: CHANGE OF NAME;ASSIGNOR:CENTERPULSE AG;REEL/FRAME:016105/0110
Owner name: CENTERPULSE AG, SWITZERLAND
Free format text: CHANGE OF NAME;ASSIGNOR:SULZER MEDICA A.G.;REEL/FRAME:016105/0101
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ZIMMER SCHWEIZ HOLDINGS AG;REEL/FRAME:016127/0737
Owner name: GROUPE POUR L'UTILISATION ET L'ETUDE DES PROTHÈSES
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ZIMMER GMBH;REEL/FRAME:016127/0739
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ZIMMER GMBH;REEL/FRAME:016369/0707