EP1812175A1 - Procede et systeme de tri d'articles postaux au moyen de bacs de transfert conformement a des informations d'identification - Google Patents

Procede et systeme de tri d'articles postaux au moyen de bacs de transfert conformement a des informations d'identification

Info

Publication number
EP1812175A1
EP1812175A1 EP04791431A EP04791431A EP1812175A1 EP 1812175 A1 EP1812175 A1 EP 1812175A1 EP 04791431 A EP04791431 A EP 04791431A EP 04791431 A EP04791431 A EP 04791431A EP 1812175 A1 EP1812175 A1 EP 1812175A1
Authority
EP
European Patent Office
Prior art keywords
sorting
data
identifier data
rack
identifier
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.)
Withdrawn
Application number
EP04791431A
Other languages
German (de)
English (en)
Inventor
Rainer Kalevi Waltzer
Pekka Ilmari Nousiainen
Mikael Vilhelm Nyberg
Lasse Allan YLÄNEVA
Juha Kalervo Salminen
Arto Tampio
Jari Kalervo Paasikivi
Jyrki Olavi Janatuinen
Kari Juhani Hiltunen
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.)
ITELLA Oyj
Original Assignee
Suomen Posti Oy
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 Suomen Posti Oy filed Critical Suomen Posti Oy
Publication of EP1812175A1 publication Critical patent/EP1812175A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C3/00—Sorting according to destination

Definitions

  • the invention relates to a method and a system for sorting an object provided with identifier data, preferably a postal item, the sorting comprising both sorting into a rack and collecting from a rack by identifier data.
  • a sorting rack typically comprises delivery bins, into which the postal items are directed manually on the basis of data on an address tag.
  • Each distribution path can be allocated an individual sorting rack with bins, into which postal items are sorted and from which postal items are collected for delivery.
  • Preliminary postal delivery operations typically include steps for sorting postal items in a rack in accordance with address data, with sorting into the rack being performed by the street, road or number, and the postal items collected from the rack manually according to a delivery list. These steps are time consuming and require experienced staff. The work performance also requires printouts. There have been efforts to develop various partly automated work steps have been developed to facilitate sorting operations.
  • Prior art systems and methods for sorting postal items in a sorting rack equipped with bins have been depicted in US 6,881,890, for instance.
  • a computer-controlled scanner reads a bar code on an envelope, and then the corresponding address is searched in the databank and information about the bin number corresponding to the address is transmitted to an input/output circuit.
  • the input/output circuit is connected as an integrated part of a circuitry including an input line from an infrared detector in each bin and an output line to a guide light provided in each bin.
  • the computer transmits the address number to the input/output circuit, it turns on the guiding light of the associated bin, allowing the sorter to put the postal item into this particular bin.
  • the guide light of this bin is switched off and identification of the next postal item can be started.
  • the system described in US 6,881,890 comprises an output line of the input-output circuit connected to a warning light provided in each bin.
  • a warning light in this bin gives an alarm, so that the sorter may remove the item from the erroneous bin and resort it into the correct bin indicated by the guide light.
  • this system does not guarantee that the postal item is sorted into the correct bin, should the bar code be incorrectly read in the identification step or had it not been read at all. If the bar code is defective or torn or otherwise destroyed in the identification step, the bar code cannot be read and the postal item will require resorting carried out completely by hand.
  • the purpose of the invention is to eliminate the problems mentioned above and to provide a method and a system for sorting an object equipped with identifier data, in which an identification unit reads partial identifier data, completes the partial identifier data into corrected identifier data and compares the identifier data thus formed with sorting data stored in a database, the object being directed to the correct delivery bin on the basis of the comparison.
  • the method and system of the invention markedly increase sorting automation, because the number of incorrectly interpreted identifier data and thus of wrongly sorted objects decreases appreciably in the sorting step. Accordingly, the step of collecting objects is enhanced, because the proportion of incorrectly sorted objects has been minimised in the sorting step.
  • the collecting step is further enhanced by the fact that, whenever possible, the collecting area of the sorting rack is formed of those bins alone into which objects have been sorted, or that empty bins are not even examined.
  • sorting quality and efficiency are improved, thus reducing the time, work steps and costs required for sorting and speeding up delivery of the object.
  • the invention provides a system for sorting at least one object equipped with identifier data
  • the system comprising a sorting rack including several delivery bins and associated guide means, which are connected with the controller unit of a computer and a database including sorting data communicating with the computer
  • the system comprising an identification unit, which is connected to the controller unit of the computer and the database including sorting data communicating with the computer, in order to read identifier data
  • the system being characterised by the fact that the identification unit comprises reading means for reading at least partial identifier data of the object, processing means for complementing the read partial identifier data into corrected identifier data, and comparative means for comparing the corrected identifier data with sorting data stored in the database, the sorting data serving as a basis for controlling the sorting of the object by means of the guide means.
  • the sorting system comprises a switch connected to the controller unit of the computer and the guide means for setting the operating mode of the digitalised sorting rack into a mode for collecting from the rack, the collection list comprising the identifier data of the objects stored in a database, the collection list serving as a means for generating a control signal in the controller unit of the computer for transmission to the guide means of the delivery bins, and guide means for guiding the collection of the object under said control signal.
  • the invention provides a method for sorting at least one object equipped with identifier data in a sorting rack, which comprises a plurality of delivery bins, the method comprising steps for
  • the sorting method identifies and indicates the delivery bins for controlling the sorting rack and switches the mode of the digitalised sorting rack either into a mode for sorting into the rack or into a mode for collecting from the rack.
  • the invention provides a system for sorting an object for delivery, the system comprising a digitalised sorting rack with a plurality of delivery bins and associated guide means connected to the controller unit of a computer and a database equipped with sorting data communicating with the computer with a view to controlling the sorting for delivery, the system being characterised by the feature that said guide means are adapted to indicate by said sorting data the delivery bin presently in turn and to indicate discriminatingly the delivery bin next in turn with a view to controlling the sorting of the object for delivery.
  • the invention provides a method for sorting an object for delivery into a digitalised sorting rack comprising a plurality of delivery bins, the method comprising steps for
  • Figure Ia is a block diagram of the sorting system of one embodiment comprising a digitalised sorting rack
  • Figure Ib is a block diagram of a second embodiment of a sorting system comprising a digitalised sorting rack
  • FIG. 2 is a block diagram of an identification unit of one embodiment
  • Figure 3 is a block diagram of the identification unit of a second embodiment
  • Figure 4 shows the user interface of an embodiment of the identification unit of an application
  • Figure 5 is a flow chart of a method of one embodiment for sorting an object into a rack by the identifier data of the object
  • Figure 6 is a flow chart of a method of a second embodiment for sorting an object into a rack by the identifier data of the object
  • Figure 7 is a flow chart of a method of one embodiment for identifying an object for sorting
  • FIG. Ia shows an embodiment of the system of the invention for sorting an object equipped with identifier data.
  • the sorting rack 10 comprises a plurality of delivery bins 11, into which the objects to be sorted are sorted by the desired sorting criteria, and from which the sorted objects are collected by the desired collecting criteria.
  • sorting denotes both sorting the object into a rack, i.e. input, and collection of the object from the rack, i.e. output.
  • the sorting of the object is controlled by a computer 30 and an indicator means 13 installed in each delivery bin and a recognition means 15 installed in connection with each array of delivery bins 112 consisting of a plurality of delivery bins.
  • the array of delivery bins 112 is preferably a column of bins consisting of delivery bins 11, as shown with a dashed line 112 in figure Ia.
  • sorting the object into the rack and collecting the object from the rack are mutually independent operations.
  • sorting into the rack is a separate independent function and collection from the rack is a separate independent function.
  • Identifier data implies data about the object to be sorted that are needed for carrying out the sorting, in other words, for transferring the object into the correct bin.
  • the identifier data may be any data allowing the object to be sorted into the rack.
  • the identifier data may consist of address data or a technical identifier, such as address identifier data, delivery point identifier data or any similar data for delivery control, so that the object does not require any actual address data at all.
  • the identifier data may be provided in different forms in the object, such as in the form of alphanumerical signs, bar codes, a radio-frequency identifier, preferably as an RFID, an optical identifier or an electrical identifier.
  • the identifier data may be printed out or programmed directly in the object, on a tag to be affixed to the object, a printed circuit board or any other substrate, or it may be integrated in the object in any similar manner known per se.
  • substrate will be used below to designate the various manners for connecting the identifier data to the object mentioned above.
  • a system of the invention comprising a digitalised sorting rack 10, is controlled by a computer 30 comprising at least one controller unit and a memory, and also by a switch SW 40 and an I/O controller I/O 50, which are connected both to the controller unit of the computer and to the rack.
  • the switch 40 is connected between the controller unit and the I/O controller 50 and the I/O controller is connected between the controller unit and the bins 11 of the rack.
  • the switch SW has the function of switching the digitalised sorting rack either into a mode for sorting into the rack or into a mode for collecting from the rack.
  • connection 131 is arranged from the I/O controller 50 to the indicator means 13 of each bin and a connection 151 to the recognition means 15 of each array of delivery bins 112.
  • the connections 131, 151 can be carried out as wire communication lines consisting of output lines 131 and input lines 151.
  • the lines 131, 151 preferably form a bus controlled from the controller unit of the computer.
  • the I/O controller may be in wireless communication, instead of communication lines, with the indicator means 13 provided in each bin, and e.g. communicate by radio or optical means with the recognition means 15 provided in each bin array, and then the I/O controller, the indicator and recognition means are equipped with the transmission and reception means required for the communication in question.
  • the sorting of the object is controlled by means of an indicator means 13 installed in each delivery bin 11, preferably a signal light or any other light-emitting component, and an recognition means 15, preferably a distance sensor, installed in connection with each array of delivery bins 112, preferably column of bins,.
  • the signal light 13 indicates to the sorter into which bin 11 the object presently in turn shall be placed, and the distance sensor 15 identifies the input of the object into the bin, and then the signal light is turned off.
  • the distance sensor 15 identifies the input of the object into a bin
  • the identifier data of the new object are read, and as a result of this, the bin into which the new object shall be placed is indicated to the sorter, and the signal light of the preceding bin is switched off.
  • the delivery bin indicated for the new object may be the same bin as the one indicated for the preceding object.
  • the signal light 13 indicates to the sorter the bin from which the object presently in turn shall be collected, and the distance meter 15 identifies the collection of the object from the bin in the manner described in connection with figure 5.
  • the light signal of this particular bin is turned off and the bin of the object to be collected next is indicated by the related light signal being turned on.
  • the collecting step uses simultaneously two mutually different light signals of two bins, so that the light signal relating to bin of the object to be collected next in turn after the presently collected object, i.e. the bin to be collected next, indicates that this bin is in turn to be collected next after the bin presently in turn for collection.
  • the light signals indicate the bin presently in turn to be collected and the bin next in turn to be collected with the light signal of the former continuously turned on and the light signal of the latter blinking, for instance.
  • the distance sensor of the bin to be collected next identifies collection of the object from the bin, it transmits an acknowledge signal of successful collection to the computer 30 acting as the central processing unit.
  • the computer shifts the light arrangement by one step forward, i.e. the light signal of the preceding, i.e. collected bin goes out, the light signal of the subsequent bin, i.e. the one presently in turn to be collected, stops blinking and is turned on continuously, and the light signal of the bin subsequent to the bin presently in turn, i.e. of the bin in turn to be collected next, starts blinking.
  • Both the light signals mentioned above may also be lighted continuously, yet with a mutually different light or emitting clearly different signals.
  • the controller unit 30 of the computer is connected with an identifying unit 20 for at least partial reading and identification of the identifying data and a database DB 60, in which data required for sorting are stored, such as sorting data and collection lists.
  • the data stored in the database can be retrieved from other data systems when the sorting starts and they can be changed and/or updated in real time, provided that the database is integrated in the data network.
  • the identifying unit includes either a connected memory or the identifying unit uses the memory of the computer as its memory for storing data it has identified.
  • one or more applications SOVl, SOV2 70, 80 have been stored in the memory connected to the computer controller unit for performing various functions as desired, such as identification, processing, correction and/or comparison.
  • the digitalised sorting rack 10 which consists of a plurality of bin columns, can be divided into several rack sections, whose sorting functions can be selected as mutually different.
  • the rack section comprises an array of bin columns 112, which is illustrated with a dashed line in figure Ia and with reference 114, and bin columns can be combined into independently acting rack sections 114 by programming or any other connections.
  • the numbers of bin columns or bin rows included in the rack section can be freely selected.
  • sorting the object into the rack and collecting the object from the rack are mutually independent operations.
  • Each rack section of the sorting rack then comprises conductors connected over a separate switch SW 40 to the computer 30 from the I/O controller 50 to this rack section.
  • the divided sorting rack allows the sorting functions to be determined by rack sections, so that the different sorting steps may proceed in parallel.
  • Each switch SW has the function of switching this rack section either in a mode for sorting into the rack or a mode for collecting from the rack.
  • Figure Ib illustrates a system of a second embodiment of the invention. It differs from the embodiment in figure Ia only in that, besides the indicator means 13, each bin has an individual recognition means 15. This provides a communication between the I/O controller 50 and the indicator means 13 of each bin and a communication 151 to the recognition means 15 of each bin 112.
  • the communications 131, 151 can be carried out as wire communications consisting of output lines 131 and input lines 151.
  • the communications 131, 151 preferably form a bus controlled from the controller unit of the computer.
  • the I/O controller may be in wireless communication with an indicator means 13 provided in each bin, and a recognition means 15 provided in each bin over the radio or optically, for instance, and then the I/O controller, the indicator and recognition means are equipped with appropriate transmission and reception means required for communication.
  • FIG. 2 is a block diagram of an identifying unit 20 of one embodiment.
  • an identifying unit 20 communicating with the sorting rack 10 comprises reading means 22, by means of which it reads the at least partial identifying data of the object 2 to be sorted, and a memory, in which it stores the identifying data it has read.
  • the memory (not illustrated) may be a separate or integrated storage means in the reading means or a memory card or the identifying unit may use the computer memory as its memory for storage of the data it has identified.
  • the camera KAM 22 reads, i.e. images in this case, the identifying data related to the object 2, which may be provided in the object as such or connected to a substrate 5 for instance.
  • the substrate 5 may be a printout of alphanumeric signs, a bar code tape, an infrared printout or any similar substrate affixed to the object, in which the readable identifying data are generated.
  • the camera 22 is connected to the controller unit and memory of the computer 30 and over this to the applications SOVl, SOV2 as shown in figure 1.
  • the computer for instance, can be equipped with an IEEE 1394 PCI card for connecting the camera.
  • the identifying unit may further comprise a display 32, a keyboard 34 or a combination of these connected to the computer, such as a contact display screen, or any other data feed means, by means of which the applications SOVl, SOV2 can be controlled over their user interfaces. There may be one or more applications SOVl, SOV2 in use.
  • the camera is preferably a digital camera.
  • the camera resolution may be e.g. 768 x 1024 pixels and the pixel size may be e.g. 6.25 x 6.25 ⁇ m 2 .
  • the camera my have an imaging rate of e.g. 15 full-pixel pictures per second.
  • the imaging distance i.e. the distance between the front surface of the camera objective and the imaging area on the identification substrate is e.g. 370 mm.
  • the object to be sorted is placed on the identification substrate 19 in connection with the identifying unit for reading of the identifying data in a manner such that the identifying data of the object get on the identification substrate, i.e. in this case on the imaging area of the camera 21 with the identifying data facing the camera.
  • This application uses generally the term imaging area to denote the identifying area.
  • the camera is equipped with a lens 221, by means of which the imaging area of the camera can be adjusted as desired.
  • a light source 24 is further mounted in the vicinity of the camera and oriented so as to efficiently illuminate the imaging area adjusted with the lens 221 of the camera 21. This is particularly useful in spaces where sorting is performed with irregular illumination.
  • the light source 24 can be mounted in the same stand as the camera, in which it can be shifted and its light incident angle can be adjusted as well.
  • a lens (not illustrated in the figure) can be mounted in front of the light source of preferably one or more LEDs, the lens allowing collection of light from one or more LEDs and focussing it efficiently to the imaging area.
  • the focal length of the lens in front of the LEDs of the light source may be e.g. 50 mm and its diameter 25.4 mm.
  • the LEDs have the additional advantage of allowing pulsation e.g. at a frequency of 60 Hz, the light appearing as continuously switched on, and of having long service life and low power consumption.
  • the light source 24 preferably comprises five LEDs disposed e.g.
  • the LEDs of the light source 24 indicate the centre and the corners of the imaging area.
  • the LEDs should be switched off when an image is taken in order to prevent heir emission light from interfering with the identification of the identifying data.
  • imaging takes only about 10 ms, so that the substrate 5 including the identifying data can still be correctly positioned even though the LEDs are switched off for such a short period.
  • a second light source 26 is mounted on the other side of the identification substrate with respect to the camera, perpendicularly to the camera lens, the light source illuminating the identification substrate from the side opposite to the camera and forming light points 261 on the identification substrate.
  • the light points are formed on the identification substrate e.g. by drilling one or more holes, preferably five holes 261 in the shape of a cross, for instance, at the second light source 26.
  • the second light source 26 preferably comprises five LEDs, which are embedded e.g. in the shape of a cross in the identification substrate 19, preferably in a light or transparent plastic sheet.
  • the light detector detects when an object to be imaged is in the imaging area, the object covering at least part of the light points and preferably all of the light points, whereby the light received by the light detector from the second light source decreases or ceases.
  • the camera starts imaging the identifying data of the object, which should now be located in the imaging range on the identification substrate.
  • the first and the second light source 24, 26, each preferably comprising five LEDs in cross shape indicate the centre and the corners of the imaging area on the identification substrate.
  • first light source 24 and the second light source 26 are disposed with respect to each other such that the camera pulsation is set to be synchronised into the same phase as the second light source and into the opposite phase relative to the light source, so that the camera is activated to image the identifying data of the first object on the identification substrate under the control of said pulsation.
  • a third light source 28 is mounted in the vicinity of the camera and is oriented so as to efficiently illuminate the imaging area adjusted by the lens 221 of the camera 21 on the identification substrate 19. This is especially useful in spaces where sorting is performed in irregular light conditions.
  • the light source 28 can also be mounted in the same stand as the camera, where it can be shifted in the horizontal plane and its incident angle can also be adjusted. This allows adjustment of the light incident angle so as to avoid mirror reflection from glossy samples.
  • a lens (not shown in the figures) can be mounted in front of the light source 28 to allow collection of light from one or more LEDs and focussing it on the imaging area on the identification substrate.
  • cross-shaped LEDs are mutually disposed so that the camera pulsation is set to be synchronised in the same phase as the third light source 28 and in the opposite phase relative to the first light source 24 and the second light source 26, so that the camera is activated to image the identifying data of the object on the identification substrate under the control of said pulsation.
  • the person who performs the sorting may carry a reading means 22, preferably a camera, as a means of automated sorting.
  • a reading means 22 preferably a camera
  • the person carrying out sorting should have both his hands free for handling the object.
  • the camera should be fixed to the sorter's shoulder, helmet or any other location leaving his hands free.
  • the moment of imaging could be selected e.g. using a push button provided on a glove that the sorter is wearing.
  • Data transmission between the camera and the computer can occur by wireless means, e.g. over the radio.
  • FIG. 3 shows a bloc diagram of an identifying unit 20 of a second embodiment.
  • an identifying unit 20 connected to a digitalised sorting rack 10 comprises reading means 21, by means of which it reads the at least partial identifying data of the object to be sorted 2, and a memory in which it stores the identifying data it has read.
  • the memory (not illustrated) may be a separate or integrated memory means or memory card in the reading means, or the identifying unit may use the computer memory as its data storage for storage of data it has identified.
  • the receiver RF 21 reads, in other words, receives in this case, identifying data on the substrate 5 connected to the object 2.
  • the substrate 5 comprises a transmitter means 23, which transmits receivable identifying data on e.g. radio frequency, in optical form or any similar form.
  • the receiver 21 is preferably a radio receiver RF which receives the radio signal transmitted by the radio transmitter 23 of the substrate 5, preferably an RFID signal.
  • the receiver 21 my also be an optical receiver, preferably an optical detector, which receives the optical signal transmitted by the optical transmitter 23 of the substrate 5.
  • the receiver 21 is connected to the controller unit and memory of the computer 30 and over this to applications SOVl, SOV2 as illustrated in figure 1.
  • the identifying unit may further comprise a display 32 connected to the computer, a keyboard 34 or a combination of these, such as a contact display, or any other data input means, allowing control of applications SOVl, SOV2 over their interfaces.
  • the object to be sorted is placed on the identification substrate 19 connected to the identifying unit for reading of the identifying data. There may be one or more applications SOVl, SOV2 in use.
  • the embodiments of the digital sorting rack 10 illustrated in figures 1-3 comprise applications SOVl, SOV2, 70, 80, which are intended to be stored in the memory of the computer 30 and to perform various necessary functions, such as identification, processing, correction and/or comparison. It also possible to connect a display 32 connected to a computer, a keyboard 34 or a combination of these, such as a contact display or any other data input means, to the identifying unit 20, 21, 22 connected to the computer, these means allowing control of the applications SOVl, SOV2 over their interfaces.
  • the processor speed and the storage capacity affect the imaging, image manipulation and text reading speed of the apparatus.
  • a flat-panel display as such does not require much space.
  • the display can be used to indicate to the user when an image has been generated for identification and to indicate the results of the identification.
  • the algorithm interprets it at an inclination of 0 or 7 degrees, i.e. a value with an error of 3.5 degrees. Since an addition of 3 degrees to the end points of the range does not impair the angular resolution of the algorithm, this addition can be made.
  • the text may be also upside down in these images, in other words, noting that the text is e.g. at an inclination of 15 degrees, it could equally well be at an inclination of 195 degrees.
  • the algorithm described above yields a value of the text orientation angle in the range -45 to +135 degrees. When the image is positioned at such an angle, the text may be upside down.
  • Character string 2 is the result of the optic character recognition and character string 2 is the character string in the database with which the recognition result is compared.
  • N is the number of found character pairs
  • MJl and MJ2 are character string 1 and character string 2.
  • the correlation coefficient obtained in this example is 0.67.

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  • Warehouses Or Storage Devices (AREA)
  • Sorting Of Articles (AREA)

Abstract

L'invention concerne un procédé et un système de tri d'articles (2) portant des données d'identification. Le système comprend une étagère de triage numérisée (10) portant une pluralité de bacs de transfert (11) qui sont dotés d'un dispositif de guidage (13, 15) connectés à une unité de commande informatique (30) et à une base de données (60) renfermant des données de tri et connectée à l'ordinateur. Le système comprend une unité d'identification (20), connectée à l'unité de commande informatique (30) et à la base de données (60), qui contient des données de triage et qui communique avec l'ordinateur pour la lecture des données d'identification. L'unité d'identification comprend un dispositif de lecture (21, 22) des données d'identification au moins partielles de l'article, un dispositif de traitement (30, 70, 80) complétant les données d'identification partielles, et un dispositif de comparaison (30, 70, 80) permettant de comparer les données d'identification corrigées aux données de tri stockées dans la base de données, à la suite de quoi le dispositif d guidage dirige le tri des articles. Dans le système de l'invention, le rangement de l'objet dans l'étagère et son extraction de l'étagère sont des fonctions qui peuvent être sélectionnées indépendamment l'une de l'autre. Le rangement des articles dans l'étagère et leur extraction peuvent se faire simultanément avec l'étagère de triage numérisée, laquelle est subdivisée en sections de triage (114).
EP04791431A 2004-10-29 2004-10-29 Procede et systeme de tri d'articles postaux au moyen de bacs de transfert conformement a des informations d'identification Withdrawn EP1812175A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2004/000640 WO2006045878A1 (fr) 2004-10-29 2004-10-29 Procede et systeme de tri d'articles postaux au moyen de bacs de transfert conformement a des informations d'identification

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Publication Number Publication Date
EP1812175A1 true EP1812175A1 (fr) 2007-08-01

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EP (1) EP1812175A1 (fr)
NO (1) NO20072725L (fr)
WO (1) WO2006045878A1 (fr)

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