EP1771611B1 - Knitted fabric that is electrically conductive in a biaxial manner - Google Patents

Knitted fabric that is electrically conductive in a biaxial manner Download PDF

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Publication number
EP1771611B1
EP1771611B1 EP05771149.1A EP05771149A EP1771611B1 EP 1771611 B1 EP1771611 B1 EP 1771611B1 EP 05771149 A EP05771149 A EP 05771149A EP 1771611 B1 EP1771611 B1 EP 1771611B1
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EP
European Patent Office
Prior art keywords
knitted fabric
thread
electrically conductive
rows
electrically
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Application number
EP05771149.1A
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German (de)
French (fr)
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EP1771611A1 (en
Inventor
Christof Kurth
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Medi GmbH and Co KG
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Medi GmbH and Co KG
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Publication of EP1771611A1 publication Critical patent/EP1771611A1/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
    • D04B1/16—Other fabrics or articles characterised primarily by the use of particular thread materials synthetic threads
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/10—Patterned fabrics or articles
    • D04B1/12—Patterned fabrics or articles characterised by thread material
    • D04B1/123—Patterned fabrics or articles characterised by thread material with laid-in unlooped yarn, e.g. fleece fabrics
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/13—Physical properties anti-allergenic or anti-bacterial
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/16—Physical properties antistatic; conductive
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
    • Y10T442/102—Woven scrim
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
    • Y10T442/102—Woven scrim
    • Y10T442/109—Metal or metal-coated fiber-containing scrim
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/40—Knit fabric [i.e., knit strand or strip material]

Description

Die vorliegende Erfindung betrifft ein elektrisch leitfähiges Gestrick, bestehend aus Maschenreihen eines elektrisch nicht leitfähigen Grundfadens sowie Maschenreihen eines zwischen diesen angeordneten elektrisch leitfähigen Fadens, wobei zwischen den Reihen aus elektrisch leitfähigem Faden stellenweise eine die Reihen aus elektrisch nicht leitfähigem Faden übergreifende Verbindung besteht.The present invention relates to an electrically conductive knitted fabric consisting of courses of an electrically non-conductive base thread and courses of an electrically conductive thread arranged between them, wherein between the rows of electrically conductive thread in places there is a series of electrically non-conductive thread cross-connection.

Ein derartiges Gestrick ist aus der EP-A-O 281 526 bekannt. Aufgabe dieses Gestricks ist die Ableitung elektrostatischer Aufladung, bzw. deren Verteilung über das Gestrick. Auch die EP-A-O 185 480 löst diese Aufgabe, wobei in ein elastisches Gestrick Fäden aus zum Beispiel Metall beschichteten Fasern eingearbeitet sind, die mit einem Grundfaden verstrickt sind. Nach einer Ausführung wird ein Gestrick vorgeschlagen, bei dem eine Seite aus einem nicht leitfähigen Faden besteht und die andere Seite aus dem leitfähigen Faden. Elektrisch leitfähige Fäden werden jedoch nicht nur zur Ableitung elektrostatischer Aufladung vorgeschlagen. Die DE-A- 199 29 077 schlägt zum Beispiel ein Silbergewebe zur Abschirmung elektrischer und hochfrequenter magnetischer Felder vor. In ähnlicher Weise äußert sich die DE-A- 196 48 544 . Die US-A-4,653,473 schlägt schließlich die Verarbeitung von Stahlfäden für Kleidungsstücke vor, um sowohl den so genannten Phantomschmerz bei Amputationen zu verringern oder auch zur Linderung von Arthritis beizutragen. Den Phantomschmerz zu bekämpfen ist ebenfalls eine Aufgabe der DE-U-202 08 592 , die einen Liner für Stümpfe vorschlägt, in den eine Matrix aus elektrisch leitfähigem Material eingearbeitet ist. Als elektrisch leitfähiges Material wird Silber als Faden oder Beschichtung des Fadens bevorzugt, da es zusätzlich antibakterielle Eigenschaften aufweist. Jedoch ist Silber ein sehr teueres Material, so dass Gestricke rein aus Silberfäden oder mit Silber beschichteten Fäden für breite Anwendungen nicht in Frage kommen.Such a knit is from the EP-AO 281 526 known. The task of this knit fabric is the dissipation of electrostatic charge, or their distribution over the fabric. Also the EP-A-0 185 480 solves this problem, wherein in an elastic fabric threads of, for example, metal-coated fibers are incorporated, which are entangled with a ground yarn. According to one embodiment, a knit fabric is proposed in which one side consists of a non-conductive thread and the other side of the conductive thread. However, electrically conductive threads are proposed not only for dissipating electrostatic charge. The DE-A-199 29 077 For example, proposes silver cloth for shielding electric and high-frequency magnetic fields. Similarly, the DE-A-196 48 544 , The US-A-4,653,473 Finally, proposes the processing of steel threads for garments in order to reduce so-called phantom pain in amputations or to contribute to the relief of arthritis. Fighting the phantom pain is also a task of the DE-U-202 08 592 , which proposes a liner for stumps, in which a matrix of electrically conductive material is incorporated. As an electrically conductive material, silver is preferred as a thread or coating of the thread, since it additionally has antibacterial properties. However, silver is a very expensive material, so knits made purely of silver filaments or silver-coated filaments are out of the question for wide applications.

DE 92 13 884 U1 offenbart ein gestricktes Flächenheizelement aus Maschenware, mit in die Maschenware eingearbeiteten Heiz- und Kontaktleitern. Das Flächenheizelement umfasst zwei beheizte Bereiche, an deren Rand jeweils ein Kontaktbereich vorgesehen ist. DE 92 13 884 U1 discloses a knitted surface heating element made of knitted fabric, with incorporated in the knit fabric heating and contact conductors. The surface heating element comprises two heated regions, at the edge of each of which a contact region is provided.

EP 0 532 468 A1 offenbart ein elektrisches Heizelement aus textiler Maschenware. Das Heizelement umfasst mindestens zwei leitfähige, voneinander getrennte Stromzuführdrähte und von einem zu einem anderen Stromzuführdraht verlaufende Widerstandsdrähte. Die Stromzuführdrähte sind nach der Intarsientechnik in mindestens eine Reihe jeweils übereinanderliegender, sich umschlingender Maschen und die Widerstandsdrähte in waagerechte Maschenreihen mit mindestens je einer nichtleitenden Maschenreihe Abstand in die Maschenware eingearbeitet. EP 0 532 468 A1 discloses an electric heating element made of textile knitwear. The heating element comprises at least two conductive, separate power supply wires and extending from one to another power supply wire resistance wires. The power supply wires are incorporated according to the intarsia technique in at least one row of each superimposed, looping around meshes and the resistance wires in horizontal courses with at least one non-conductive mesh spacing in the knit fabric.

Die Verwendung von Metallfäden, Fäden, die mit Metall beschichtet sind oder Fäden aus nicht leitfähigem Material, die von einem Metallfaden umwickelt sind setzt hinsichtlich der Elastizität dem erhaltenen Gestrick gewisse Grenzen. Aufgäbe der vorliegenden Erfindung ist es, ein Gestrick zu schaffen, das Fäden aus einem elektrisch leitfähigen Material enthält, das biaxial leitfähig ist, aber auch soweit erwünscht in wenigstens einer Richtung eine große Elastizität aufweist. Aufgabe der vorliegenden Erfindung ist es weiter, ein Gestrick zu schaffen, mit dem eine biaxiale elektrische Leitfähigkeit bei deutlicher Reduzierung des Silberanteils am Gestrick erreicht werden kann.The use of metal threads, threads which are coated with metal or threads of non-conductive material which are wrapped by a metal thread sets in terms of elasticity of the fabric obtained certain limits. It is an object of the present invention to provide a knit comprising threads of an electrically conductive material which is biaxially conductive but which also has great elasticity in at least one direction as desired. It is also an object of the present invention to provide a knitted fabric with which a biaxial electrical conductivity can be achieved with a significant reduction in the silver content of the fabric.

Diese Aufgabe wird mit den Merkmalen des kennzeichnenden Teils des Anspruchs 1 gelöst. Fortbildungen und vorteilhafte Ausführungen der Erfindung sind in den weiteren Ansprüchen umfasst.This object is achieved with the features of the characterizing part of claim 1. Training and advantageous embodiments of the invention are included in the further claims.

Erfindungsgemäß ist ein elektrisch leitfähiges Gestrick, bestehend aus Maschenreihen eines elektrisch nicht leitfähigen Grundfadens, sowie Maschenreihen eines zwischen diesen angeordneten elektrisch leitenden Fadens, wobei sich auch mehrere Reihen elektrisch nicht leitfähigen Grundfadens mit einer oder mehreren Reihen aus elektrisch leitfähigem Faden abwechseln können, dadurch gekennzeichnet, dass zwischen den Reihen aus elektrisch leitfähigem Faden stellenweise eine die Reihen aus elektrisch nicht leitfähigem Faden übergreifende Verbindung besteht. Als leitfähiger Faden werden bevorzugt metallisierte PA (Polyamid) oder PES (Polyester) Garne oder auch leitfähige Polymere, oder ein mit diesen Garnen umsponnener Elastomerfaden eingesetzt. Wiederum bevorzugt ist aufgrund seiner antibakteriellen Eigenschaften und guten Verstrickbarkeit versilbertes PA. Auch beim nicht leitfähigen Garn wird PA und PES bevorzugt, bzw. mit PA oder PES umsponnener Elastomerfaden.According to the invention, an electrically conductive knitted fabric consisting of courses of an electrically nonconductive base thread and courses of an electrically conductive thread arranged between them, wherein also several rows of electrically non-conductive base thread can alternate with one or more rows of electrically conductive thread, characterized in that between the rows of electrically conductive thread in places there is a series of electrically non-conductive thread cross-connection. As a conductive thread preferably metallized PA (polyamide) or PES (polyester) yarns or conductive polymers, or used with these yarns wound elastomeric thread. Again preferred is silver-plated PA because of its antibacterial properties and good entangleability. Also in non-conductive yarn PA and PES is preferred, or with PA or PES wound elastomer thread.

Nach einer Ausführung der Erfindung wird die Verbindung durch übergreifende Maschen der jeweils benachbarten Reihen des elektrisch leitfähigen Fadens über flottliegende Abschnitte des elektrisch nicht leitfähigen Fades erzielt.According to one embodiment of the invention, the connection is achieved by overlapping meshes of the respective adjacent rows of electrically conductive thread over flottish sections of the electrically non-conductive fade.

Nach einer anderen Ausführung der Erfindung erfolgt die Verbindung durch Überbrückung des elektrisch nicht leitfähigen Fadens mit Hilfe von Masche, Fang, Plattierung, Flottung oder Umhängen des elektrisch leitfähigen Fadens.According to another embodiment of the invention, the connection is made by bridging the electrically non-conductive thread by means of mesh, catch, plating, float or transfer of the electrically conductive thread.

Erfindungsgemäß sind die Verbindungsstellen im Versatz zueinander angeordnet. Der Versatz kann regelmäßig sein. Durch diese Maßnahme wird erreicht, dass sich in Strickrichtung eine weitgehend eben so große Elastizität ergibt, als ob keine übergreifende Verbindungen zwischen den aus elektrisch leitfähigem Material bestehenden Reihen bestehen würde.According to the invention, the connection points are arranged offset relative to one another. The offset can be regular. By this measure it is achieved that in the knitting direction results in a largely just as great elasticity, as if there were no cross-connections between the existing of electrically conductive material rows.

Nach einer vorteilhaften Ausführung der Erfindung ist in das Gestrick ein flottliegender oder als Fang eingelegter Schussfaden eingearbeitet. Als Schussfaden kann zum Beispiel ein elastomerer Faden gewählt werden, wenn z.B. für Bandagen Kompressionszonen gebildet werden sollen. Ein anderes Beispiel ist die Verwendung von unelastischem Faden, z.B. Chenille-Faden als Schussfaden, wenn bei Bandagen als Stabilisierungszonen unelastische Stützzonen eingearbeitet werden sollen.According to an advantageous embodiment of the invention, a flothless or inserted as a catch weft thread is incorporated into the fabric. As a weft thread, for example, an elastomeric thread may be selected, e.g. for bandages compression zones are to be formed. Another example is the use of inelastic thread, e.g. Chenille thread as weft thread, if in bandages as stabilization zones inelastic support zones are to be incorporated.

Die Dehnbarkeit beträgt in Strick- und quer zur Strickrichtung mindestens 150%. Die Dehnbarkeit wurde auf einer Dinema DSC Messmaschine Version 2 mit einerThe stretch is at least 150% in knitting and across the knitting direction. The extensibility was on a Dinema DSC measuring machine version 2 with a

Belastung von 20 kg ermittelt. Bevorzugte Ausführungen des Gestricks erreichen 300% quer zur Strickrichtung und 320% in Strickrichtung.Load of 20 kg determined. Preferred embodiments of the knitted fabric reach 300% transverse to the knitting direction and 320% in the direction of knitting.

Der spezifische Flächenwiderstand des unverdehnten Gestricks in Längs- und Querrichtung beträgt weniger als 10 Ohm. Der spezifische Flächenwiderstand wurde an unverdehnt 150 x 150 mm großen, flächigen Mustern des Gestricks ermittelt. Dazu wurden die jeweils gegenüberliegenden Ränder des Musters in Längs bzw. Querrichtung mit Hilfe von 4 verzinnten Kupferblöcken der Dimension 150 x 12 x 5 mm geklemmt, sodass sich eine freie Breite des Textilmusters von 126 mm ergibt. Um auf den spezifischen Flächenwiderstand des quadratischen Musters rückzurechnen, wird der erhaltene Wert mit 150/126 multipliziert. Zur Messung des Durchgangswiderstandes wurde ein Taschenvoltmeter der Marke Voltcraft, Typ VC333 eingesetzt.The surface resistivity of the unstretched fabric in the longitudinal and transverse directions is less than 10 ohms. The specific surface resistance was determined on unstretched 150 x 150 mm large, flat patterns of the knitted fabric. For this purpose, the respectively opposite edges of the pattern were clamped in longitudinal or transverse direction by means of 4 tinned copper blocks of the dimension 150 x 12 x 5 mm, so that a free width of the textile pattern of 126 mm results. To get back to the surface resistivity of the square pattern, multiply the obtained value by 150/126. To measure the volume resistance, a volt voltmeter type VC333 was used.

Im Folgenden wird die Erfindung anhand von Zeichnungen beispielhaft näher beschrieben. Dabei zeigen:

  • Fig. 1 eine erste Ausführung eines Gestricks;
  • Fig. 2 eine zweite Ausführung eines Gestricks.
In the following the invention will be described by way of example with reference to drawings. Showing:
  • Fig. 1 a first embodiment of a knitted fabric;
  • Fig. 2 a second version of a knitted fabric.

Das Gestrick gemäß Fig. 1 besteht aus Reihen eines elektrisch nicht leitfähigen Garns 1, zwischen denen Reihen eines elektrisch leitfähigen Garns 2 eingestrickt sind. Um eine Verbindung der Maschenreihen des elektrisch leitfähigen Garns 2 herzustellen und so eine biaxiale Leitfähigkeit zu ermöglichen, weisen die Reihen des elektrisch nicht leitfähigen Garns (1) flottliegende Abschnitte 3 auf, über die vergrößerte Maschen 2" des elektrisch leitfähigen Garns 2 greifen und mit der nächsten Reihe des elektrisch leitfähigen Garns 2' verstrickt sind.The fabric according to Fig. 1 consists of rows of electrically non-conductive yarn 1, between which rows of electrically conductive yarn 2 are knitted. In order to make a connection of the courses of the electrically conductive yarn 2 and thus to allow a biaxial conductivity, the rows of electrically non-conductive yarn (1) flottane sections 3, over the enlarged mesh 2 "of the electrically conductive yarn 2 engage and with the next row of electrically conductive yarn 2 'are entangled.

Fig. 2 zeigt ein alternatives Gestrick, bei dem die flottliegenden Abschnitte 3 des elektrisch nicht leitfähigen Garns 1 über zwei Maschen geführt sind und entsprechend zwei vergrößerte Maschen 2" des elektrisch leitfähigen Garns bis zur nächsten Reihe elektrisch leitfähigen Garns 2 reichen. Bei dieser Ausführung ist weiter ein flottliegender Schussfaden 4 eingearbeitet. Fig. 2 shows an alternative knit fabric, in which the floats sections 3 of the electrically non-conductive yarn 1 are guided over two stitches and, accordingly, two enlarged stitches 2 "of the electrically conductive yarn until to the next row of electrically conductive yarn 2 range. In this embodiment, a flying weft thread 4 is further incorporated.

Claims (8)

  1. An electrically conductive knitted fabric comprising knitted rows of an electrically non-conductive ground thread (1) and knitted rows of an electrically conductive thread (2) arranged between the former, whereas a connection overlapping the rows made from electrically non-conductive thread is provided in places between the rows of electrically conductive threads (2), characterised in that
    the connecting places are arranged offset from one another.
  2. The knitted fabric according to claim 1,
    characterised in that
    the connection is achieved by overlapping stitches (2") of the respectively adjacent rows of the electrically conductive thread (2) over floating portions (3) of the electrically non-conductive thread.
  3. The knitted fabric according to claim 1,
    characterised in that
    the connection is made by bridging of the electrically non-conductive thread by means of stitching, tucking, floating or looping of the electrically conductive thread (2) .
  4. The knitted fabric according to claim 1,
    characterised in that
    the offset is arranged in a regular manner.
  5. The knitted fabric according to any one of the preceding claims,
    characterised in that
    a weft thread (4), floating or inserted as a tuck, is worked into the knitted fabric.
  6. The knitted fabric according to any one of the preceding claims,
    characterised in that
    the stretch in the knitting direction and transversely to the knitting direction is at least 150%.
  7. The knitted fabric according to any one of the preceding claims,
    characterised in that
    the specific surface resistance of the un-stretched knitted fabric in the longitudinal direction and transverse direction is less than 10 ohms.
  8. The knitted fabric according to any one of the preceding claims,
    characterised in that
    several rows of electrically non-conductive ground thread alternate with one or more rows of electrically conductive thread (2).
EP05771149.1A 2004-07-24 2005-07-21 Knitted fabric that is electrically conductive in a biaxial manner Active EP1771611B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004038636A DE102004038636A1 (en) 2004-07-24 2004-07-24 Electrically biaxially conductive fabric
PCT/DE2005/001279 WO2006010358A1 (en) 2004-07-24 2005-07-21 Knitted fabric that is electrically conductive in a biaxial manner

Publications (2)

Publication Number Publication Date
EP1771611A1 EP1771611A1 (en) 2007-04-11
EP1771611B1 true EP1771611B1 (en) 2013-09-25

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EP05771149.1A Active EP1771611B1 (en) 2004-07-24 2005-07-21 Knitted fabric that is electrically conductive in a biaxial manner

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Country Link
US (1) US8476172B2 (en)
EP (1) EP1771611B1 (en)
JP (1) JP4964770B2 (en)
BR (1) BRPI0513547A (en)
DE (2) DE102004038636A1 (en)
EA (1) EA010089B1 (en)
ES (1) ES2440474T3 (en)
UA (1) UA92589C2 (en)
WO (1) WO2006010358A1 (en)

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DE102004038636A1 (en) 2006-02-16
EP1771611A1 (en) 2007-04-11
JP4964770B2 (en) 2012-07-04
UA92589C2 (en) 2010-11-25
ES2440474T3 (en) 2014-01-29
US8476172B2 (en) 2013-07-02
DE112005002409A5 (en) 2007-07-12
BRPI0513547A (en) 2008-05-06
JP2008507631A (en) 2008-03-13
EA200700164A1 (en) 2007-06-29
WO2006010358A1 (en) 2006-02-02
US20070298666A1 (en) 2007-12-27
EA010089B1 (en) 2008-06-30

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