EP1163638A1 - Support de donnees et procede de lecture d'informations - Google Patents

Support de donnees et procede de lecture d'informations

Info

Publication number
EP1163638A1
EP1163638A1 EP00969151A EP00969151A EP1163638A1 EP 1163638 A1 EP1163638 A1 EP 1163638A1 EP 00969151 A EP00969151 A EP 00969151A EP 00969151 A EP00969151 A EP 00969151A EP 1163638 A1 EP1163638 A1 EP 1163638A1
Authority
EP
European Patent Office
Prior art keywords
data
data carrier
carrier according
read
area
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Withdrawn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
EP00969151A
Other languages
German (de)
English (en)
Inventor
Mihai Petrescu
Thomas Waibel
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.)
A-Tronic MGM AG
A Tronic MGM AG
Original Assignee
A-Tronic MGM AG
A Tronic MGM AG
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 A-Tronic MGM AG, A Tronic MGM AG filed Critical A-Tronic MGM AG
Publication of EP1163638A1 publication Critical patent/EP1163638A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/10—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means together with a coded signal, e.g. in the form of personal identification information, like personal identification number [PIN] or biometric data
    • G07F7/1008—Active credit-cards provided with means to personalise their use, e.g. with PIN-introduction/comparison system
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0716—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising a sensor or an interface to a sensor
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/073—Special arrangements for circuits, e.g. for protecting identification code in memory
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/073—Special arrangements for circuits, e.g. for protecting identification code in memory
    • G06K19/07309—Means for preventing undesired reading or writing from or onto record carriers
    • G06K19/07345—Means for preventing undesired reading or writing from or onto record carriers by activating or deactivating at least a part of the circuit on the record carrier, e.g. ON/OFF switches
    • G06K19/07354—Means for preventing undesired reading or writing from or onto record carriers by activating or deactivating at least a part of the circuit on the record carrier, e.g. ON/OFF switches by biometrically sensitive means, e.g. fingerprint sensitive
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • G06Q20/34—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using cards, e.g. integrated circuit [IC] cards or magnetic cards
    • G06Q20/341—Active cards, i.e. cards including their own processing means, e.g. including an IC or chip
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/40—Authorisation, e.g. identification of payer or payee, verification of customer or shop credentials; Review and approval of payers, e.g. check credit lines or negative lists
    • G06Q20/401—Transaction verification
    • G06Q20/4014—Identity check for transactions
    • G06Q20/40145—Biometric identity checks
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/20—Individual registration on entry or exit involving the use of a pass
    • G07C9/22—Individual registration on entry or exit involving the use of a pass in combination with an identity check of the pass holder
    • G07C9/25—Individual registration on entry or exit involving the use of a pass in combination with an identity check of the pass holder using biometric data, e.g. fingerprints, iris scans or voice recognition
    • G07C9/257—Individual registration on entry or exit involving the use of a pass in combination with an identity check of the pass holder using biometric data, e.g. fingerprints, iris scans or voice recognition electronically

Definitions

  • the invention is in the field of security technology and relates to a data carrier and a method for reading out information stored on a data carrier.
  • the data carrier When in use, the data carrier is plugged into a comparison device, which usually reads the digitized fingerprint optically, digitizes it, and compares it with the fingerprint of the person holding his finger at a specific location on the device.
  • a comparison device which usually reads the digitized fingerprint optically, digitizes it, and compares it with the fingerprint of the person holding his finger at a specific location on the device.
  • the big disadvantage is. that all institutions in which the card is approved must have a comparison print and a corresponding fingerprint comparison device.
  • conventional magnetic stripe or chip cards there is a risk that the information on the card can nevertheless be relatively easily cracked, for example by simply copying the data.
  • the data carrier should preferably, but not necessarily, be readable with conventional reading devices. The object is achieved by the invention as defined in the patent claims.
  • the data carrier according to the invention is based on the idea of designing a data carrier in such a way that the data to be read out can only be made physically readable by activation. Activation takes place when stored biometric data match the biometric data of a user. A biometric sensor is located on the data carrier to determine compliance.
  • a preferred embodiment of the invention includes a plastic card, as z. B. is used for credit cards.
  • a biometric sensor for example a fingerprint recognition system (fingerprint sensor) of the type which is known per se and is commercially available, is applied or introduced thereon.
  • the biometric sensor is equipped with a readout area carrying data, for. B. a magnetic strip connected.
  • One or more processor means which are also located on the card and are preferably integrated directly with the sensor in a chip, control the reading and / or writing to the reading area carrying the data.
  • data can be transferred from a processor in the chip to the readout area after activation by the biometric sensor.
  • all data is stored in the chip.
  • data can also be stored in the readout area, for example if the readout area is designed as a magnetic strip.
  • the data is not physically accessible. Only when activated by the biometric sensor does the fault mechanism go out of operation and the data on the magnetic stripe become accessible.
  • the data is stored in the form of different magnetizations of the magnetic strip on commercially available cards with magnetic strips.
  • the sequence of bits can be read in a chronological order.
  • One consideration on which an embodiment of this invention is based is, for example, that this temporal sequence of the bits can alternatively also be generated sequentially by, for example, magnetic coils.
  • a card designed in this way with an active readout area can be constructed as follows: B. is at the position of a card, where there is usually a magnetic stripe, a magnetic coil for each bit track. These magnetic coils are used to output the information which is stored on the magnetic stripe in conventional cards and which is additionally present in the chip here.
  • the chronological sequence of the bits is controlled by a processor on a chip, wherein the chip can also be the evaluation unit of the biometric sensor.
  • the control speed of the magnetic coils generated in this way is not critical since reader devices can process different pulling speeds.
  • the readout area can consist of an arrangement of conductor tracks. These generate magnetic fields by means of a power supply attached to the readout area in such a way that they transmit the data stored in a processor on the card one after the other into the readout area as soon as the activation via biometric sensor, for example a fingerprint sensor, has taken place.
  • This special type of readout area additionally offers the possibility of the strip through external mechanisms, e.g. B. inductive to describe.
  • One way to protect data-carrying, passive readout areas, for example magnetic strips is to provide means for generating interference fields on the magnetic strip in such a way that no magnetic reversal takes place in the magnetic strip. This is done, for example, by attaching specially designed, for example, network-like conductor tracks to the magnetic strip.
  • the conductor tracks are supplied with current or voltage by an electrical supply on the card and are regulated by a control unit on the chip.
  • Such a network-like interference grating forms magnetic interference fields which prevent readout until the biometric sensor is deactivated. This causes the control unit of the interference grid to interrupt the power supply, so that the magnetic interference fields are switched off and the data stored on the magnetic strip can be read out.
  • Both the embodiment with magnetic field-producing conductor tracks and the embodiment with a magnetic strip and with interference fields generating Conductors have the advantage that they can be designed in such a way that the activated data carrier can be read out with conventional readers.
  • the read-out area consists of a material in which a magnetic field is generated when an electric field is applied.
  • a material in which a magnetic field is generated when an electric field is applied can be, in particular, liquid crystals, the liquid crystals to be used being aligned in the external electrical field and additionally having a permanent magnetic moment.
  • the liquid crystals arranged in the readout area can be aligned by electrodes arranged in a matrix in accordance with the data transmitted by a processor located on the card.
  • the advantage of this embodiment is that all data are only written into the readout area when the chip is activated.
  • the information can already be present in the arrangement of the magnetic moments of the liquid crystals.
  • all that then has to be created is a uniform electric field: the liquid crystals align themselves in the electric field in accordance with their electrical polarization, as a result of which their magnetic moment takes on the desired orientation.
  • the data carrier according to the invention can, if necessary, with one on the
  • Card attached electrical supply This can be a battery or an accumulator, for example with flexible thin-film Photovoltaic cells, such as are commercially available, are fed.
  • a unit is also conceivable, which from the outside, for. B. can be charged inductively.
  • the security against unauthorized use of the data carriers according to the invention is guaranteed in each of the exemplary embodiments mentioned and increased compared to conventional data carriers: all the data on the card must either first be transferred to the readout area or the data already on the magnetic strip must be first be made actively readable, e.g. B. Cancellation of an interference field. Both are done by activating a biometric sensor.
  • the sensor for verifying biometric information integrated on the data carrier according to the invention is preferably a sensor for recognizing fingerprints. But it can also be a detection system for z. B. be biometric information about more than one finger, palm prints, voice patterns, retinal structure or pulse noises. Sensors for motor properties of the user, for example the signature, are also interpreted in this text as biometric sensors. So z. B. instead of or in addition to a fingerprint sensor on the data carrier, a signature reading system can be attached. Any combinations of biometric sensors with conventional security devices are also conceivable, for example with a field directly on the card with touch or membrane buttons, via which a PIN must be entered to be released. Furthermore, the data carrier according to the invention closes a wide variety of embodiments such as. B. credit cards, access control systems, personal identification cards etc. with.
  • the data carrier has an integrated signature reading system, it is equipped with an area which is provided with a sensor grid.
  • the signature written in this area is compared with stored data. If there is a match - within a certain tolerance - the data to be read on the data carrier are made accessible in a readout area.
  • the writing can, depending on the type of sensors z. B. done by pressure or with a pen with a magnetic tip.
  • a combination of the signature reading system with a more common biometric sensor, e.g. B. a fingerprint sensor. further increases security.
  • the read-out area is integrated in the chip. All data is stored there and can be read directly from the chip as soon as a biometric sensor on the data carrier is activated.
  • This embodiment of the data carrier according to the invention would enable the older magnetic stripe system to be successively replaced by a pure chip solution with an integrated biometric sensor.
  • chip readers such as are already commercially available, could be used to read out these data carriers. Magnetic stripe readers could be retrofitted.
  • Figure 1 is a plan view of a preferred embodiment of the data carrier according to the invention with an active readout area.
  • Figure 2 is a plan view of a preferred embodiment of the data carrier according to the invention with a network-like interference grating
  • Figure 3 is a plan view of a preferred embodiment of the data carrier according to the invention with a liquid crystal readout area
  • FIG. 1 shows an embodiment of the data carrier 1 according to the invention with an active readout area 2.
  • the card contains a chip 3 with an active surface 4 of a biometric sensor, eg B. a Finge ⁇ rintsensor, and a control unit 5, z. B. a processor.
  • the card contains an electrical supply, 6 and 7, which preferably consists of a battery 6 or accumulator, which is charged by a solar cell 7.
  • the biometric sensor 4 is preferably combined with the control unit 5 in a chip 3.
  • the battery 6 is connected to the chip 3 and is responsible for the electronic supply of the chip 3 and readout area 2.
  • the chip 3 is connected to the read-out area 2 and, above all, controls the data of the biometric sensor 4 to be compared, the activation of the data transmission process, and the data transmission itself.
  • the active readout area is constructed as follows: it consists of a number of interconnected, loop-forming conductor tracks 8, which form magnetic coils as soon as current flows. The direction of flow of the current determines the direction of the magnetic field. Current can be sent individually through the conductor tracks 8, so that the individual magnetic coils form a correspondingly directed magnetic moment. By sequentially and individually passing currents through the loops, the data are transmitted successively to the readout area 2.
  • the sequence of transmission to the read-out area 2 corresponds to a “swipe” of a card with a magnetic strip carrying all the data through the reader, but takes place, for example, while the card is essentially stationary.
  • the data carrier 1 described in FIG. 1 is used in a first step by reading out the biometric sensor 4.
  • the chip 3 has switching means: When activated by the biometric sensor, the data carrier assumes a first state in which no current flows through the Wires 8 flow in a second state in which a successive data transmission from chip 3 to readout area 2 takes place. When the data transmission is complete, the power supply from the chip 3 into the readout area 2 is interrupted, so that there is no more data in the readout area 2. The data can thus only be read out if the chip 3, after activation by the biometric sensor 4, outputs targeted current signals into the conductor tracks of the readout area 2 and the data to be read out are thus only written into the readable area 2, here the magnetic coils. It is possible here, for. B. also a controller to limit the activation time.
  • the data can be continuously transmitted to the readout area 2 for a certain time, for example one minute after the activation.
  • the information is also accessible for reading by devices that do not allow a finger to be placed on the biometric sensor during the reading process.
  • the conductor tracks 8 and / or the chip 3 additionally have means (not yet drawn) for short-welding individual conductor loops.
  • Such short welding can ensure, for example, that no magnetic field with a disturbing field strength can build up in the vicinity of a conductor loop.
  • the drawn course and the number of conductor loops are only an example; in reality there will be 5 ladder loops, for example.
  • the inductive transmission of data to the embodiment of the active read-out area 2 described in FIG. 1 takes place, for example, by one of one alternating field generated by an external writing and reading station.
  • the data transmission then takes place in the manner known per se from digital transmission technology.
  • a device can also be present in the control unit by means of which an alternating supply field also captured by the conductor tracks can be recognized, for example, by its frequency and is already passed on the input side of the control unit to a rectification device.
  • This rectification device serves, for its part, to charge a battery 6.
  • FIG. 2 is an example of a preferred embodiment of the data carrier 101 according to the invention with a biometric sensor 104, e.g. B. Finge ⁇ rintsensor, magnetic strip 102 and thin metal network 109 applied thereon to generate an interference field.
  • the card contains, inter alia, a chip 103, an electrical supply 106 and a magnetic strip 102 with network-like conductor tracks 109 applied thereon, which serve as readout protection for the data already present in the magnetic strip 102.
  • the biometric sensor 104 and the entire control unit 105 are preferably integrated in the chip 103.
  • the magnetic strip 102 already contains all of the information to be read out. However, this cannot be read out without activation because the magnetic interference field 109 is superimposed on the information from the magnetic strip 102.
  • This magnetic interference field 109 is generated by the network of metal wires applied over the information-carrying magnetic strip 102. As long as a current flows through the wire mesh 109, according to the Biot-Savart theorem, a magnetic field is formed over the magnetic strip 102 and is superimposed on the magnetic fields generated by the permanent magnetic moments of the magnetic strip 102, which prevents reading.
  • the z. B. directly on the card electrical supply 106, the z. B. can be realized as described in Figure 1, the permanent presence of the magnetic interference field 109 enables. If the biometric sensor 104 is now activated, the current is turned off, the interference field goes out of operation and the magnetic strip 102 can be read.
  • the data carrier is a reliable electrical supply 106 for the network-like interference grating 109. If the data carrier is not activated by the biometric sensor 104, the interference field is maintained above the magnetic strip 102 and the stored data cannot be read.
  • FIG. 3 describes - very schematically - a further embodiment of the data carrier 201 according to the invention.
  • a card contains a chip 203, an electrical supply 206 and an active read-out area 202.
  • the chip 203 including electrical supply 206 is preferably composed as described in FIG. 1, ie it contains a biometric sensor 204 and a control unit.
  • the active readout area 202 replaces the conventional magnetic stripe. It has, for example, liquid crystals 209 which have a permanent magnetic moment 210, e.g. B. by an iron core.
  • the electrical properties of the liquid crystals 209 ensure that the crystals align themselves in the external electrical field 211.
  • an electrical field 211 is applied to the liquid crystals 209 so that they can be aligned and read out in the readout area 202 in accordance with the data transmitted from the chip 203.
  • the power supply is interrupted and there is no longer an electrical field 211.
  • the liquid crystals 209 rearrange themselves and the data present thereon can no longer be read out from the read-out area 202.
  • the liquid crystals 209 are contacted in segments and individually controlled by matrix-like electrodes, so that all of the information is transferred from the chip 203 into the readout area 202.
  • the active readout area 202 consists of liquid crystals 209 with magnetic moments 210 which are individually oriented relative to the direction of the applied or to be applied electric field. The entire information is thus magnetically stored on the readout area 202. If an electric field 211 is applied to the readout area 202 or the liquid crystal strip, direct it Depending on their direction of polarization, the crystals 210 extend in the direction or opposite direction of the applied electric field 211.
  • This variant requires that the arrangement of the liquid crystals 209 is prepared in the manufacture of the data carrier in such a way that they are correctly aligned when the electrical field is applied. The advantage of this variant is the very simple wiring between chip 203 and readout area 202.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Computer Security & Cryptography (AREA)
  • Strategic Management (AREA)
  • General Business, Economics & Management (AREA)
  • General Engineering & Computer Science (AREA)
  • Finance (AREA)
  • Human Computer Interaction (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

L'invention concerne un support de données dont les données sont protégées d'une utilisation non autorisée au moyen d'un détecteur biométrique (4). Le détecteur compare les données biométriques lues avec des données biométriques mémorisées. Ce n'est qu'en cas de concordance que les données mémorisées du support de données qui doivent être lues peuvent être rendu physiquement lisibles par activation. Ceci s'effectue soit par transfert des données dans une zone lisible (2) sur le support de données, soit par mise hors circuit d'un champ parasite généré sur la zone lisible, après activation du détecteur biométrique.
EP00969151A 1999-10-28 2000-10-30 Support de donnees et procede de lecture d'informations Withdrawn EP1163638A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH196599 1999-10-28
CH196599 1999-10-28
PCT/CH2000/000577 WO2001031577A1 (fr) 1999-10-28 2000-10-30 Support de donnees et procede de lecture d'informations

Publications (1)

Publication Number Publication Date
EP1163638A1 true EP1163638A1 (fr) 2001-12-19

Family

ID=4222763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00969151A Withdrawn EP1163638A1 (fr) 1999-10-28 2000-10-30 Support de donnees et procede de lecture d'informations

Country Status (3)

Country Link
EP (1) EP1163638A1 (fr)
AU (1) AU7897300A (fr)
WO (1) WO2001031577A1 (fr)

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MA41187A (fr) 2014-12-19 2021-04-07 Cardlab Aps Procédé et ensemble pour générer un champ magnétique et procédé de fabrication d'un ensemble
EP3035230A1 (fr) 2014-12-19 2016-06-22 Cardlab ApS Procédé et ensemble permettant de générer un champ magnétique
EP3082071A1 (fr) 2015-04-17 2016-10-19 Cardlab ApS Dispositif pour produire un champ magnétique et procédé associé

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AU7897300A (en) 2001-05-08

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