EP0031869B1 - Transition between a coaxial cable and a multipolar pluggable connector - Google Patents

Transition between a coaxial cable and a multipolar pluggable connector Download PDF

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Publication number
EP0031869B1
EP0031869B1 EP80105013A EP80105013A EP0031869B1 EP 0031869 B1 EP0031869 B1 EP 0031869B1 EP 80105013 A EP80105013 A EP 80105013A EP 80105013 A EP80105013 A EP 80105013A EP 0031869 B1 EP0031869 B1 EP 0031869B1
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Prior art keywords
conductor
transition
plug connector
cable
conducting surface
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Expired
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EP80105013A
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German (de)
French (fr)
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EP0031869A2 (en
EP0031869A3 (en
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Johannes Dipl.-Ing. Schmitz
Roland Röhrbein
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Bosch Telecom GmbH
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ANT Nachrichtentechnik GmbH
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Priority to AT80105013T priority Critical patent/ATE2468T1/en
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Publication of EP0031869A3 publication Critical patent/EP0031869A3/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00Coupling devices of the waveguide type
    • H01P5/08Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H01P5/085Coaxial-line/strip-line transitions

Definitions

  • the invention relates to a transition from a coaxial cable to a multi-pin connector.
  • crosstalk attenuation and reflection or transmission attenuation of a connector are generally not as high as for analog transmission.
  • the crosstalk attenuation and the reflection or transmission attenuation at the connection points can assume somewhat less favorable values than in the transmission of analog signals without any significant disturbing influence on the signal transmission.
  • the invention is therefore based on the object of replacing the customary coaxial connector with a multi-pole connector which is connected to a coaxial cable by means of a transition which is simple to manufacture.
  • the object is achieved in that the transition from a coplanar ribbon cable with a conductor strip which is surrounded by a conductive surface, and insulated from it, is that the inner conductor of the coaxial cable with one end of the conductor strip and the outer conductor at least on one Place is contacted with the conductive surface of the ribbon cable that the other end of the conductor strip is contacted with a pin of the multi-pin connector and at least one of the pins adjacent to this pin with the conductive surface of the ribbon cable.
  • a useful embodiment of the inven tion is that the contact points of the coaxial outer conductor on the conductive surface of the ribbon cable are arranged symmetrically around the contact point of the coaxial cable inner conductor with the conductor strip, that the contact points of the connector on the conductive surface around the contact point of the connector with the Conductor strips are arranged symmetrically distributed and that the ratio between the width of the conductor strip and the width of the recess in the conductive surface of the ribbon cable, in which the conductor strip is located, is selected so that the characteristic impedance of the coaxial cable is matched to that of the connector, the Characteristic impedance Z b of the ribbon cable as a function of the dielectric constant Er of the base material and of the ratio between the width of the recess in the conductive surface and the width of the conductor strip is determined by
  • the coplanar ribbon cable has a conductive surface 4 with an elongated recess 5 of width B, in which a conductor strip 6 of width b - insulated from the conductive surface 4 - is embedded.
  • the wave resistance of this coplanar ribbon cable depends on the ratio between the width B of the cutout 5 and the width b of the conductor strip 6.
  • the characteristic impedance of the ribbon cable can be determined using the following equation:
  • the characteristic impedance Z b is such that there is an optimal match between the characteristic impedance of the coaxial cable and that of the multi-pole connector. From Meinke / Gundlach: Taschenbuch der Hochfrequenztechnik, Springer Verlag, 1968, 3rd edition, p. 384, it follows that a resistance adjustment occurs when the characteristic impedance of the adjustment line is equal to the geometric mean of the two resistors to be adjusted.
  • the contacting of the coaxial cable 2 and the multi-pin connector 3 with the ribbon cable should take place so that the homogeneity of the field on the ribbon cable is not disturbed as far as possible.
  • the outer conductor 7 of the coaxial cable is contacted (for example soldered) with the conductive surface 4 at several points 8.
  • the four contact points of the outer conductor present here are in the vicinity of the contact point 9 of the inner conductor 10 one end of the conductor strip 6 arranged semicircular symmetrically around this.
  • the multi-pin connector 3 is connected to the other end of the strip conductor by a pin 11 and the pins 12 adjacent to this pin 11, the position of which is predetermined by the pin pitch of the multi-pin connector 3 used, are in contact with the conductive surface 4.
  • the pins 12 are distributed symmetrically around the contact point of the pin 11 with the conductor strip and connected to the conductive surface.
  • FIG. 2 shows a detachable connection of a coaxial cable 13 to a subrack 14.
  • the coaxial cable is connected to one end of a ribbon cable 15 described above, the other end of which is connected to a female connector 16.
  • a male connector 17 is arranged, which is plugged into the female connector 16.
  • FIG. 3 Another application example of the invention is shown in FIG. 3. This is a plug connection between two coaxial cables.
  • the two coaxial cables 18 and 19 are each contacted with a ribbon cable 20 and 21.
  • a ribbon cable is connected to a male connector 22 which is plugged onto the female connector 23 arranged on the other ribbon cable.

Abstract

A transition piece for establishing a transition between a coaxial cable having an inner conductor and an outer conductor and a plug-in connector component having a plurality of terminals disposed adjacent one another, composed of a coupling member in the form of a coplanar stripline presenting a conductive strip and a conductive surface surrounding, and electrically insulated from, the conductive strip, the coupling member being connected to the coaxial cable and the connector component in such a manner that the inner conductor of the cable is connected to a point at one end of the conductive strip, the outer conductor of the cable is connected to the conductive surface, a first terminal of the connector component is connected to a point at the end of the conductive strip opposite its one end, and at least one terminal adjacent the first terminal is connected to the conductive surface.

Description

Die Erfindung betrifft einen Übergang von einem Koaxialkabel auf einen mehrpoligen Steckverbinder.The invention relates to a transition from a coaxial cable to a multi-pin connector.

Üblicherweise bestehen lösbare Verbindungen von Koaxialkabeln miteinander oder von Koaxialkabeln mit Baugruppenträgern aus Koaxiatsteckverbindern. Solche Koaxialsteckverbinder erfüllen hohe Anforderungen, z. B. an die Reflexions- bzw. Durchlaßdämpfung. Daher bietet sich ihr Einsatz bei der Übertragung von Analogsignalen an. Eine hohe elektrische Qualität der Koaxialsteckverbinder erfordert aber eine präzise Herstellung, weshalb derartige Steckverbinder sehr teuer sind.Usually there are detachable connections of coaxial cables to one another or of coaxial cables with subracks made of coaxial connectors. Such coaxial connectors meet high requirements, e.g. B. the reflection or transmission loss. Therefore, they can be used for the transmission of analog signals. A high electrical quality of the coaxial connector, however, requires precise manufacture, which is why such connectors are very expensive.

Bei der Übertragung digitaler Signale sind im allgemeinen keine so hohen Anforderungen an die Nebensprechdämpfung und die Reflexions- bzw. Durchlaßdämpfung eines Steckverbinders zu stellen wie bei der Analogübertragung. Die Nebensprechdämpfung und die Reflexions- bzw. Durchlaßdämpfung an den Verbindungsstellen können ohne nennenswerte störende Einflußnahme auf die Signalübertragung etwas ungünstigere Werte als bei der Übertragung analoger Signale annehmen.When transmitting digital signals, the requirements for crosstalk attenuation and reflection or transmission attenuation of a connector are generally not as high as for analog transmission. The crosstalk attenuation and the reflection or transmission attenuation at the connection points can assume somewhat less favorable values than in the transmission of analog signals without any significant disturbing influence on the signal transmission.

Der Einsatz von Koaxialsteckverbindern unter diesen Bedingungen würde eine unnötige Redundanz in Bezug auf die elektrische Qualität einer lösbaren Verbindung mit sich bringen, die eine Verteuerung der Geräte zur Folge hat.The use of coaxial connectors under these conditions would result in unnecessary redundancy with regard to the electrical quality of a detachable connection, which would make the devices more expensive.

Der Erfindung liegt daher die Aufgabe zugrunde, den gebräuchlichen Koaxialsteckverbinder durch einen mehrpoligen Steckverbinder, der mittels eines einfach herzustellenden Überganges mit einem Koaxialkabel verbunden ist, zu ersetzen.The invention is therefore based on the object of replacing the customary coaxial connector with a multi-pole connector which is connected to a coaxial cable by means of a transition which is simple to manufacture.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß der Übergang aus einer koplanaren Bandleitung mit einem Leiterstreifen der von einer leitenden Fläche, und zwar isoliert von dieser, umgeben ist, besteht, daß der Innenleiter des Koaxialkabels mit einem Ende des Leiterstreifens und der Außenleiter mindestens an einer Stelle mit der leitenden Fläche der Bandleitung kontaktiert ist, daß das andere Ende des Leiterstreifens mit einem Stift des mehrpoligen Steckverbinders und mindestens einer der diesem Stift benachbarten Stifte mit der leitenden Fläche der Bandleitung kontaktiert ist.According to the invention the object is achieved in that the transition from a coplanar ribbon cable with a conductor strip which is surrounded by a conductive surface, and insulated from it, is that the inner conductor of the coaxial cable with one end of the conductor strip and the outer conductor at least on one Place is contacted with the conductive surface of the ribbon cable that the other end of the conductor strip is contacted with a pin of the multi-pin connector and at least one of the pins adjacent to this pin with the conductive surface of the ribbon cable.

Eine zweckmäßige Ausführungsform der Erfin dung besteht darin, daß die Kontaktierungsstellen des Koaxialkabelaußenleiters auf der leitenden Fläche der Bandleitung um die Kontaktierungsstelle des Koaxialkabelinnenleiters mit dem Leiterstreifen symmetrisch verteilt angeordnet sind, daß ebenfalls die Kontaktierungsstellen des Steckverbinders auf der leitenden Fläche um die Kontaktierungsstelle des Steckverbinders mit dem Leiterstreifen symmetrisch verteilt angeordnet sind und daß das Verhältnis zwischen der Breite des Leiterstreifens und der Breite der Aussparung in der leitenden Fläche der Bandleitung, in der der Leiterstreifen liegt, so gewählt ist, daß der Wellenwiderstand des Koaxialkabels an den des Steckverbinders angepaßt ist, wobei der Wellenwiderstand Zb der Bandleitung in Abhängigkeit von der Dielektrizitätskonstanten Er des Basismaterials und von dem Verhältnis zwischen der Breite der Aussparung in der leitenden Fläche und der Breite des Leiterstreifens bestimmt ist durch

Figure imgb0001
A useful embodiment of the inven tion is that the contact points of the coaxial outer conductor on the conductive surface of the ribbon cable are arranged symmetrically around the contact point of the coaxial cable inner conductor with the conductor strip, that the contact points of the connector on the conductive surface around the contact point of the connector with the Conductor strips are arranged symmetrically distributed and that the ratio between the width of the conductor strip and the width of the recess in the conductive surface of the ribbon cable, in which the conductor strip is located, is selected so that the characteristic impedance of the coaxial cable is matched to that of the connector, the Characteristic impedance Z b of the ribbon cable as a function of the dielectric constant Er of the base material and of the ratio between the width of the recess in the conductive surface and the width of the conductor strip is determined by
Figure imgb0001

Anhand von in der Zeichnung dargestellten Ausführungsbeispielen wird nun die Erfindung näher erläutert. Es zeigt

  • Fig. 1 den Übergang von einem Koaxialkabel auf einen mehrpoligen Steckverbinder,
  • Fig. 2 eine Steckverbindung zwischen einem Koaxialkabel und einem Baugruppenträger und
  • Fig. 3 eine Steckverbindung zwischen zwei Koaxialkabeln.
The invention will now be explained in more detail with reference to exemplary embodiments shown in the drawing. It shows
  • 1 shows the transition from a coaxial cable to a multi-pin connector,
  • Fig. 2 shows a connector between a coaxial cable and a rack and
  • Fig. 3 shows a connector between two coaxial cables.

In der Fig. 1 ist ein aus einer koplanaren Bandleitung 1 bestehender Übergang von einem Koaxialkabel 2 auf einen handelsüblichen mehrpoligen Steckverbinder 3 dargestellt. Die koplanare Bandleitung besitzt eine leitende Fläche 4 mit einer länglichen Aussparung 5 der Breite B, in die ein Leiterstreifen 6 der Breite b - isoliert von der leitenden Fläche 4 - eingebettet ist. Der Wellenwiderstand dieser koplanaren Bandleitung hängt neben der Dielektrizitätskonstanten Er des Basismaterials von dem Verhältnis zwischen der Breite B der Aussparung 5 und der Breite b des Leiterstreifens 6 ab. Der Wellenwiderstand der Bandleitung läßt sich über folgende Gleichung bestimmen:

Figure imgb0002
1 shows a transition from a coaxial cable 2 to a commercially available multi-pin connector 3, which consists of a coplanar ribbon cable 1. The coplanar ribbon cable has a conductive surface 4 with an elongated recess 5 of width B, in which a conductor strip 6 of width b - insulated from the conductive surface 4 - is embedded. In addition to the dielectric constant Er of the base material, the wave resistance of this coplanar ribbon cable depends on the ratio between the width B of the cutout 5 and the width b of the conductor strip 6. The characteristic impedance of the ribbon cable can be determined using the following equation:
Figure imgb0002

Der Wellenwiderstand Zb ist so bemessen, daß eine optimale Anpassung zwischen dem Wellenwiderstand des Koaxialkabels und dem des mehrpoligen Steckverbinders besteht. Aus Meinke/Gundlach: Taschenbuch der Hochfrequenztechnik, Springer Verlag, 1968. 3. Auflage, S. 384, geht hervor, daß eine Widerstandsanpassung dann vor'iegt, wenn der Wellenwiderstand der Anpassungsleitung gleich dem geometrischen Mittel der beiden anzupassenden Widerstände ist.The characteristic impedance Z b is such that there is an optimal match between the characteristic impedance of the coaxial cable and that of the multi-pole connector. From Meinke / Gundlach: Taschenbuch der Hochfrequenztechnik, Springer Verlag, 1968, 3rd edition, p. 384, it follows that a resistance adjustment occurs when the characteristic impedance of the adjustment line is equal to the geometric mean of the two resistors to be adjusted.

Um eine geringe Durchlaßdämpfung bzw. hohe Reflexionsdämpfung des Übergangs zu erzielen, sollte die Kontaktierung des Koaxialkabels 2 und des mehrpoligen Steckverbinders 3 mit der Bandleitung so erfolgen, daß die Homogenität des Feldes auf der Bandleitung möglichst nicht gestört wird. Aus diesem Grund ist der Außenleiter 7 des Koaxialkabels an mehreren Stellen 8 mit der leitenden Fläche 4 kontaktiert (z. B. verlötet). Die hier vorhandenen vier Kontaktstellen des Außenleiters sind in der Nähe der Kontaktstelle 9 des Innenleiters 10 mit einem Ende des Leiterstreifens 6 halbkreisförmig symmetrisch um diese verteilt angeordnet. Der mehrpolige Steckverbinder 3 ist mit einem Stift 11 mit dem anderen Ende des Streifenleiters verbunden und die diesem Stift 11 benachbarten Stifte 12, deren Position durch das Stiftraster des verwendeten mehrpoligen Steckverbinders 3 vorgegeben ist, sind mit der leitenden Fläche 4 kontaktiert. Auch hier sind, damit die Homogenität des elektrischen Feldes möglichst wenig gestört wird, die Stifte 12 symmetrisch um die Kontaktstelle des Stiftes 11 mit dem Leiterstreifen verteilt mit der leitenden Fläche verbunden.In order to achieve a low transmission loss or high reflection loss of the transition, the contacting of the coaxial cable 2 and the multi-pin connector 3 with the ribbon cable should take place so that the homogeneity of the field on the ribbon cable is not disturbed as far as possible. For this reason, the outer conductor 7 of the coaxial cable is contacted (for example soldered) with the conductive surface 4 at several points 8. The four contact points of the outer conductor present here are in the vicinity of the contact point 9 of the inner conductor 10 one end of the conductor strip 6 arranged semicircular symmetrically around this. The multi-pin connector 3 is connected to the other end of the strip conductor by a pin 11 and the pins 12 adjacent to this pin 11, the position of which is predetermined by the pin pitch of the multi-pin connector 3 used, are in contact with the conductive surface 4. Here, too, so that the homogeneity of the electrical field is disturbed as little as possible, the pins 12 are distributed symmetrically around the contact point of the pin 11 with the conductor strip and connected to the conductive surface.

Im folgenden werden zwei Beispiele für die Anwendng einer oben beschriebenen Koaxialverbindung wiedergegeben.The following are two examples of the application of a coaxial connection described above.

Fig. 2 zeigt eine lösbare Verbindung eines Koaxialkabels 13 mit einem Baugruppenträger 14. Das Koaxialkabel ist an ein Ende einer oben beschriebenen Bandleitung 15 angeschlossen, deren anderes Ende mit einer Federleiste 16 verbunden ist. Auf dem Baugruppenträger 14 ist eine Messerleiste 17 angeordnet, die auf die Federleiste 16 gesteckt ist. Auf dem Baugruppenträger ist ebenfalls eine Bandleitungsstruktur, die die Verbindung und Widerstandsanpassung zwischen der Messerleiste und den Baugruppen herstellt.2 shows a detachable connection of a coaxial cable 13 to a subrack 14. The coaxial cable is connected to one end of a ribbon cable 15 described above, the other end of which is connected to a female connector 16. On the subrack 14, a male connector 17 is arranged, which is plugged into the female connector 16. There is also a ribbon cable structure on the subrack, which creates the connection and resistance adjustment between the male connector and the assemblies.

An Einsätzen zur Aufnahme von Baugruppenträgern sind bisher die oftmals sehr vielen Anschlüsse für Koaxialkabel durch teure Koaxialstecker realisiert worden. Eine wesentliche Einsparung für solche Einsätze bringt es, wenn sämtliche Koaxialstecker durch preiswerte mehrpolige Steckverbinder mit daran angeschlossenen Bandleitungen als Übergänge auf die Koaxialkabel ersetzt werden. Es lassen sich hierbei mehrere Bandleitungen auf einer Platine anordnen, die mit einer Reihe von mehrpoligen Steckverbindern bestückt und an der Rückseite eines Einsatzes angeordnet ist.So far, the often very large number of connections for coaxial cables have been implemented by means of expensive coaxial connectors on inserts for mounting subracks. A substantial saving for such applications is achieved if all coaxial connectors are replaced by inexpensive multi-pin connectors with ribbon cables connected to them as transitions to the coaxial cables. Several ribbon cables can be arranged on a circuit board, which is equipped with a series of multi-pin connectors and is arranged on the back of an insert.

Ein weiteres Anwendungsbeispiel der Erfindung ist in Fig. 3 dargestellt. Und zwar handelt es sich hier um eine Steckverbindung zwischen zwei Koaxialkabeln. Die beiden Koaxialkabel 18 und 19 sind mit je einer Bandleitung 20 und 21 kontaktiert. Eine Bandleitung ist mit einer Messerleiste 22 verbunden, die auf die an der anderen Bandleitung angeordnete Federleiste 23 gesteckt ist.Another application example of the invention is shown in FIG. 3. This is a plug connection between two coaxial cables. The two coaxial cables 18 and 19 are each contacted with a ribbon cable 20 and 21. A ribbon cable is connected to a male connector 22 which is plugged onto the female connector 23 arranged on the other ribbon cable.

Claims (4)

1. Transition from a co-axial cable to a multi-pole plug connector, characterised thereby, that the transition consists of a coplanar tape conductor (1) with a conductor strip (6), which is surrounded by a conducting surface (4) and indeed insulated from this, that the inner conductor (10) of the co-axial cable (2) is contacted by one end of the conductor strip and the outer conductor (7) at least at one point (8) by the conducting surface (4) of the tape conductor, that the other end of the conductor strip (6) is contacted by a pin (11) of the multi-pole plug connector (3) and at least one of the pins (12) neighbouring this pin (11) is contacted by the conducting surface (4) of the tape conductor.
2. Transition from a co-axial cable to a multi-pole plug connector according to claim 1, characterised thereby, that the contact points (8) of the outer co-axial conductor (7) are arranged on the conducting surface (4) of the tape conductor to be distributed symmetrically about the contact point (9) of the inner co-axial cable conductor (10) with the conductor strip (7) and that the contact points (12) of the plug connector (3) are arranged on the conducting surface to be distributed symmetrically about the contact point (11) of the plug connector by the conductor strip.
3. Transition from a co-axial cable to a multi-pole plug connector according to claim 1, characterised thereby, that the ratio of the width (b) of the conductor strip (6) to the width (B) of the open space (5), in which the conductor strip lies, in the conducting surface (4) of the tape conductor is so chosen that the characteristic impedance of the co-axial cable (2) is matched to that of the plug connector.
4. Transition from a co-axial cable to a multi-pole plug connector according to claim 3, characterised thereby, that the characteristic impedance Zb of the coplanar tape conductor (1) is determined by
Figure imgb0004
in dependence on the dielectric constant 6r of its basic material and on ratio of the width (B) of the open space (5) in the conducting surface (4) to the width (b) of the conductor strip (6).
EP80105013A 1979-12-06 1980-08-23 Transition between a coaxial cable and a multipolar pluggable connector Expired EP0031869B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80105013T ATE2468T1 (en) 1979-12-06 1980-08-23 TRANSITION FROM A COAXIAL CABLE TO A MULTI-POLE CONNECTOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2949013A DE2949013C2 (en) 1979-12-06 1979-12-06 Transition from a coaxial cable to a multi-pin connector
DE2949013 1979-12-06

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EP0031869A2 EP0031869A2 (en) 1981-07-15
EP0031869A3 EP0031869A3 (en) 1981-07-22
EP0031869B1 true EP0031869B1 (en) 1983-02-09

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EP80105013A Expired EP0031869B1 (en) 1979-12-06 1980-08-23 Transition between a coaxial cable and a multipolar pluggable connector

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US (1) US4335364A (en)
EP (1) EP0031869B1 (en)
AT (1) ATE2468T1 (en)
CA (1) CA1128620A (en)
DE (1) DE2949013C2 (en)
DK (1) DK157225C (en)
IE (1) IE50830B1 (en)
IL (1) IL61615A (en)

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Publication number Priority date Publication date Assignee Title
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ATE2468T1 (en) 1983-03-15
DK157225C (en) 1990-04-23
US4335364A (en) 1982-06-15
IL61615A (en) 1983-09-30
IE802551L (en) 1981-06-06
CA1128620A (en) 1982-07-27
EP0031869A2 (en) 1981-07-15
DE2949013C2 (en) 1985-05-02
IL61615A0 (en) 1981-01-30
DK157225B (en) 1989-11-20
EP0031869A3 (en) 1981-07-22
DE2949013A1 (en) 1981-06-11
DK521880A (en) 1981-06-07
IE50830B1 (en) 1986-07-23

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