CN1486474A - Contactless electronic card - Google Patents

Contactless electronic card Download PDF

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Publication number
CN1486474A
CN1486474A CNA018219705A CN01821970A CN1486474A CN 1486474 A CN1486474 A CN 1486474A CN A018219705 A CNA018219705 A CN A018219705A CN 01821970 A CN01821970 A CN 01821970A CN 1486474 A CN1486474 A CN 1486474A
Authority
CN
China
Prior art keywords
card
electronic
ferrite core
portable terminal
contactless
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.)
Pending
Application number
CNA018219705A
Other languages
Chinese (zh)
Inventor
康贤秀
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.)
Individual
Original Assignee
Individual
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
Priority claimed from KR10-2001-0005129A external-priority patent/KR100432510B1/en
Priority claimed from KR1020010067248A external-priority patent/KR20030035265A/en
Application filed by Individual filed Critical Individual
Publication of CN1486474A publication Critical patent/CN1486474A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07771—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card the record carrier comprising means for minimising adverse effects on the data communication capability of the record carrier, e.g. minimising Eddy currents induced in a proximate metal or otherwise electromagnetically interfering object
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06K19/0723—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 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • Credit Cards Or The Like (AREA)
  • Aerials With Secondary Devices (AREA)
  • Details Of Aerials (AREA)

Abstract

Disclosed herein is a contactless electronic card attachable to/ or interposed in a certain position of a portable item or portable terminal. The contactless electronic card includes a loop antenna for communicating with a card reader, an electronic chip for transmitting user identification information stored therein at the request of the card reader, and a ferrite core for canceling interference from electromagnetic waves and a magnetic field while the card is read by the card reader. In accordance with the present invention, a contactless electronic card with a ferrite core for canceling interference from electromagnetic waves and a magnetic field allows the electronic card to be used while being attached to/ or interposed in a portable item such as a portable terminal, thereby improving the portability and convenience thereof and minimizing the risk of loss thereof.

Description

Contactless electronic card
Technical field
The present invention relates generally to contactless electronic card, in particular, the present invention relates to adopt the contactless electronic card of electronic chip of the non-contact type wireless electricity frequency of embedding, wherein this electronic chip employing FERRITE CORE is eliminated the interference from electromagnetic wave and magnetic field, uses thereby allow electronic cards can insert in portable set that contains interfering material or terminal or be enclosed in wherein.
Background technology
At present, along with developing rapidly of fiduciary information society, the user of card, for example, and individual or enterprise, trouble and the inconvenience in the cash process is handled in all deep feeling.Governmental authority mechanism requires to use in commercial affairs card as an economic policy.Therefore, the use of which kind of card increases sharply in commercial activity.
The example of generic card comprises all kinds, for example, has the simple recording medium of the magnetic stripe of recording user identifying information from the back side of card, until have integrated circuit (IC) card of embedding radio frequency identification (RFID) electronic chip.
RFIC card 1 with embedded chip can be divided into contact card or contactless RFIC card.Contactless RFIC card 1 can be used as the security personnel that are applicable to the control entrance and exit and blocks the key use, perhaps as the small amount payment means of paying nominal fee (for example, subway or public transport fare).In contactless RFIC card inside, a tours antenna and RFIC electronic chip are arranged, it communicates with the card reader 2 that is installed in specific position.Card reader 2 is active to read identifying information and the customer information that is deposited in the electronic chip, and by communication component 3 these information is sent to finance service merchant 4 or security system.
At the RFIC card during as the means of small amount payment (petty-settlement), to provide a kind of main service for the user, and subsequently, perhaps after a while and adopt manual type to be sent to financial server 4 with identification information user unique in the relevant electronic chip that the customer information of service is provided and in RFIC card 1, is comprised immediately.In certain date after cycle regular hour, the paying of service will be as deferment of fee.
Equally, RFIC card 1 also can be used as the rechargeable card use of payment public traffic expense.Supplementing RFIC card 1 with money can be by changing the information of the expense of supplementing with money with communicating by letter of card reader 2.Therefore, the user can supplement certain expense with money to the RFIC card, thereby store the information of new expense on RFIC card 1 subsequently having the expense of supplementing station payment some with money of the equipment of supplementing with money.
Yet, conventional non-contact RF IC-card 1 according to the above discussion, the user need carry card respectively, the risk that this just brings some inconvenience and loses.Equally, concerning can supplementing the RFIC card with money, the user can only supplement with money with certain expense to supplementing the station with money in person.
At present, the security personnel that are applicable to nominal fee block key and normally adopt non-contacting mode to be connected with card reader with the RFIC card, insulate mutually with the material that disturbs simultaneously, thereby can not experience the interference of electromagnetic wave and electromagnetic field.Therefore, under the condition without any dangerous or loss, electric energy can be transferred to electronic chip.
Yet, when being placed in, RFIC contains interfering material, for example, contain the pocket or the wallet of ferromagnetic core or sheet metal, and when being read by card reader, the user totem information that is recorded in the RFIC card just is difficult to read, because the influence of the material that is interfered.Therefore, when the RFIC card is subjected to folding or crooked and make when comprising tours antenna in the RFIC card and damaging, just can not read the RFIC card again.
By will hereinafter discussing again with the service that the RFIC card provided of portable terminal combination.Yet because the iron plate that comprised in the portable terminal, circuit and be used for the flaky material of shielding electromagnetic wave and EMI and because the influence of interfering material represents still can exist in the information some serious technical matterss of folding reading the user.
Summary of the invention
Therefore, the present invention remembers the above-mentioned problem of discussing always, and the purpose of this invention is to provide contactless electronic card, this electronic cards has FERRITE CORE, it can be used to offset the interference of electromagnetic wave and electromagnetic field, and allows electronic cards to be attached on the portable equipment such as portable terminal to use.
Another object of the present invention provides contactless electronic card, this electronic cards has FERRITE CORE, it can be used to offset the interference of electromagnetic wave and electromagnetic field, and allows to be positioned over by the nonmetallic materials and the coating of the shell that constitutes portable terminal or portable set or be installed between the EMI shielding material or device on the nonmetallic materials.
In order to finish above-mentioned purpose, the invention provides contactless electronic card, it can contact portable set or portable terminal at a certain distance, this electronic cards comprises: the tours antenna of communicating by letter with card reader is used for transmitting according to the requirement of card reader the electronic chip of the user totem information that is stored in chip; And the FERRITE CORE that is used for when card reader reads card, offsetting electromagnetic wave and electromagnetic field.
In addition, the invention provides contactless card, it can be inserted in nonmetallic materials and the coating that constitutes portable set or portable terminal or be installed between the electromagnetic interference (EMI) shielding material or device of nonmetallic materials inside surface; This card comprises: the tours antenna of communicating by letter with card reader is used for transmitting according to the requirement of card reader the electronic chip of the user totem information that is stored in chip; And the FERRITE CORE that is used for when card reader reads card, offsetting electromagnetic wave and electromagnetic field.
Description of drawings
From following going through in conjunction with the accompanying drawings, can more be expressly understood above-mentioned and other various purposes of the present invention, performance and other advantage:
Fig. 1 is the block diagram of conventional contactless RFIC card system;
Fig. 2 and 3 has shown according to the present invention the purposes of the addition type contactless electronic card of preferred embodiment; And
Fig. 4 to Fig. 6 has shown according to the present invention the purposes of the plug-in type contactless electronic card of other preferred embodiment.
Embodiment
Referring now to accompanying drawing, in institute's drawings attached, identical or similar parts are adopted identical reference symbol.
Fig. 2 and Fig. 3 have shown according to the present invention the purposes of the addition type contactless electronic card of preferred embodiment.
Contactless electronic card 20 shown in Figure 2 can be used to exempt to contact any position of portable terminal, promptly can be or in the outside of the electric battery at the back side of portable terminal 10 in the front of the folding clip of portable terminal 10, wherein, portable terminal comprises: mobile phone, PDA (personal digital assistant), or IMT (international mobile communication)-2000 terminals.
Electronic cards 20 shown in Fig. 2 comprises tours antenna and electronic chip 23 and FERRITE CORE 22, wherein, tours antenna and electronic chip 23 are used for communicating with the card reader 2 that is installed on subway or the bus, and according to the user totem information that requires in the transmission card to be stored of card reader 2, and FERRITE CORE 22 is by iron oxide (Fe 2O 4) with such as Mn, Zn or similarly metal oxide is made, be used to offset the electromagnetic wave that when reading electric magnetic card 20, produced and the interference of electromagnetic field.
Electronic cards 20 can also be used to being installed on electronic memo, portable computer and the wrist-watch.
Electronic cards 20 has one deck tack coat 21 at its back side, is used for electronic cards is bonded in the position of portable terminal 10.The FERRITE CORE 22 that is used to offset the electromagnetic wave and the interference of electromagnetic field places tack coat 21, and tours antenna and electronic chip 23 are provided on FERRITE CORE 22.At last, provide one deck coat 24, on this coat, can stamp the image ad of credit card company at the periphery of electronic cards.
For the ease of the user who uses electronic cards 20 electronic cards is installed on portable terminal, tours antenna and electronic chip 23 are provided on the FERRITE CORE 22 in the card; And also provide coat 24, stamped the image ad of credit card company on this coat in the outside of electronic cards 20.The user can be random the double face binding layer is coated on the optional position of portable terminal 10, and subsequently electronic cards 20 is bonded on the double face binding layer.
With reference now to Fig. 2,, explains that outside surface with electric battery is attached to the purposes of the electronic cards on the rear face of portable terminal 10.
At first, on carrying some position of battery at portable terminal 10, the user added the portable terminal 10 of electronic cards 20 by (for example being installed in the public traffic facility, subway or public transport) on card reader 2 time, card reader 2 will produce certain radio frequency, for example, 13.56MHz, and transmit this frequency.
Electronic cards 20 provides the tours antenna of card to produce the electron energy that can communicate with card reader 2, reads the user totem information of being stored in the electrical chip 23 that is connected with tours antenna, and requires the transmission user identification information according to card reader 2.
Card reader 2 is according to adjusting transport cost with electronic cards 20 electronic chips, 23 signal posts detected customer identification informations.This category information of adjusting transport cost and User Recognition immediately or transfer to the server 4 or the recording medium of fiscal structure after a while by communication facilities.The fiscal institution of management server 4 can change user's adjustment transport cost after cycle regular hour.
Electronic cards 20 also can be used as the charging of nominal fee, is used to pay the expense of product or service, and the scope of using can comprise gas station, supermarket, bookstore, teahouse, catering trade or the like.
Equally, just as shown in Figure 3, when electronic cards 20 was attached to such as PDA terminal 30, electronic cards 20 also can be used as the card key and uses, and it is applicable to such as research institute, the personal authority of restricted area in government department and the military installations.
As discussed above, electronic cards of the present invention comprises the FERRITE CORE 22 that wherein is used to offset Electromagnetic Interference, and be positioned at tours antenna and electronic chip 23 on the FERRITE CORE 22, comprise on the portable set or terminal that influences electromagnetic interfering material so can be attached to.
Simultaneously, Fig. 4 and Fig. 5 have shown the purposes of electronic cards according to other embodiments of the present invention.
With reference to Fig. 4 and Fig. 5, electronic cards 200 shown in Figure 4 is enclosed on the certain position of portable terminal 100, promptly, the inside of the previous section of portable terminal 100 or the electric battery at its back side, portable terminal can comprise mobile phone, PDA or IMT one 2000 terminals, etc.In more detail, plug-in type contactless electronic card 200 can be inserted in the nonmetallic materials that constitute portable terminal 100 shells and for example apply and be installed between the metal material or device of the interference of electromagnetic field (EMI) shielding material of nonmetallic materials inside surface.
Electronic cards 200 comprises: be used for the tours antenna of the user totem information that is installed in that card reader 2 in subway or the public transport communicates and can be stored according to the requirement transmission of card reader 2 and electronic chip 230 with by iron oxide (Fe 2O 4) with such as Mn, Zn or similarly metal oxide is made, be used to offset the electromagnetic wave that when reading electronic cards 20, produced and the interference of electromagnetic field.
Electronic cards 200 also can be attached on electronic memo, portable computer and the wrist-watch and use.
Electronic cards 200 is enclosed on the certain position of portable terminal 100.Electronic cards 200 can comprise as required: coat 210, be used to the FERRITE CORE 220 offsetting the interference of electromagnetic wave and electromagnetic field and be positioned at coat 210, be positioned at tours antenna and electronic chip 230 on the FERRITE CORE 200, and the tack coat of on tours antenna and electronic chip 230, making.In this case, electronic cards 200 can be enclosed in the nonmetallic materials that constitute portable terminal 100 shells and for example apply and be installed in the metal material or the portable terminal between the device of the interference of electromagnetic field (EMI) shielding material of nonmetallic materials inside surface.
Fig. 5 has shown to also have other embodiment to be enclosed in the purposes of contactless electronic card in the PDA terminal according to the present invention.Fig. 6 has shown the purposes of the electronic cards of the clip forward part that is enclosed in Foldable portable terminal 100 according to a further embodiment of the invention.
As discussed above, electronic cards of the present invention comprises: be used to offset the FERRITE CORE of electromagnetic wave and electromagnetic field, be positioned at tours antenna and electronic chip on the FERRITE CORE.Electronic cards is inserted in the nonmetallic materials and the coating of the shell that constitutes portable terminal or portable set and is installed between the interference of electromagnetic field (EMI) shielding material or device of nonmetallic materials inside surface.
Commercial Application
As discussed above, the invention provides contactless electronic cards, it comprises the ferrite that is used to offset the electromagnetic wave and the interference of electromagnetic field, and allow electronic cards to be used to be attached on the portable set such as portable terminal and use, thereby improve its portability and convenience and the risk that reduces loss.
In addition, the invention provides contactless electronic card, it comprises the ferrite that is used to offset the electromagnetic wave and the interference of electromagnetic field, and allow electronic cards to be used to be arranged on the nonmetallic materials and the coating of the shell that constitutes portable terminal or portable set and be installed between the interference of electromagnetic field (EMI) shielding material or device of nonmetallic materials inside surface, thereby improve the convenience that uses.
Although the institute of the present invention preferred embodiment that is used for illustration purpose has been discussed, when understanding: might have various improvement in the scope and spirit of the present invention of Pi Luing in the appended claims, additional and replacement this technology personage in the industry.

Claims (10)

1. contactless electronic card, it can be contained on a certain position of portable set or portable terminal, it is characterized in that it comprises:
Be used for the tours antenna that communicates with card reader;
Be used for transmitting the electronic chip of its user totem information of storing according to the card reader requirement; And
Be used to offset the FERRITE CORE of electromagnetic wave and the interference of electromagnetic field when card reader reads card.
2. according to the described contactless electronic card of claim 1, it is characterized in that described electronic cards is used to install to a certain position of the battery of described portable terminal.
3. according to the described contactless electronic card of claim 1, it is characterized in that described electronic cards has the function of petit average (petty-settlement).
4. according to the described contactless electronic card of claim 1, it is characterized in that described electronic cards has the function of the card key of the personal authority checking that is used for restricted area.
5. according to the described contactless electronic card of claim 1, it is characterized in that, also comprise:
At the tack coat that make at the back side of FERRITE CORE, electronic cards can be installed on a certain position of described portable set or portable terminal, and
Be coated in the front surface of tours antenna and electronic chip and be printed on the coat of image ad,
Wherein, described tours antenna and electronic chip are positioned on the described FERRITE CORE.
6. according to the described contactless electronic card of claim 1, it is characterized in that, also comprise:
The double face binding layer of making on the back side of FERRITE CORE makes it to allow electronic cards can be installed on a certain position of described portable set or portable terminal, and
Be coated in the front surface of tours antenna and electronic chip and be printed on the coat of image ad,
Wherein, described tours antenna and electronic chip are positioned on the described FERRITE CORE.
7. contactless electronic card, it is inserted in the nonmetallic materials and the coating of the shell that constitutes portable terminal or portable set and is installed between the interference of electromagnetic field (EMI) shielding material or device on the described nonmetallic materials inside surface, it is characterized in that it comprises:
Be used for the annular nature that communicate with card reader;
Be used for requiring the electronic chip of its user totem information of storing of transmission according to card reader; And
Be used to offset the FERRITE CORE of electromagnetic wave and the interference of electromagnetic field when card reader reads card.
8. according to the described contactless electronic card of claim 7, it is characterized in that described electronic cards is used as the equipment of petit average.
9. according to the described contactless electronic card of claim 7, it is characterized in that described electronic cards has the function of the card key of the personal authority checking that is used for restricted area.
10. according to the described contactless electronic card of claim 7, it is characterized in that, also comprise:
At the tack coat that make at the back side of FERRITE CORE, in the position that makes it to allow electronic cards can be enclosed in described portable set or portable terminal,
Be coated in the front surface of tours antenna and electronic chip and be printed on the coat of image ad,
Wherein, described tours antenna and electronic chip are positioned on the described FERRITE CORE.
CNA018219705A 2001-01-12 2001-12-28 Contactless electronic card Pending CN1486474A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR2001/854U 2001-01-12
KR2020010000854 2001-01-12
KR10-2001-0005129A KR100432510B1 (en) 2001-02-02 2001-02-02 A Sticking Contact Type Radio Frequency Integrated Chip Card
KR2001/5129 2001-02-02
KR2001/67248 2001-10-30
KR1020010067248A KR20030035265A (en) 2001-10-30 2001-10-30 Embedded Contact Type Radio Frequency Integrated Chip Card

Publications (1)

Publication Number Publication Date
CN1486474A true CN1486474A (en) 2004-03-31

Family

ID=27350388

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA018219705A Pending CN1486474A (en) 2001-01-12 2001-12-28 Contactless electronic card

Country Status (3)

Country Link
JP (1) JP2004527026A (en)
CN (1) CN1486474A (en)
WO (1) WO2002056247A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7796949B2 (en) 2004-05-21 2010-09-14 Panasonic Corporation Wireless communications terminal, communications protocol switching method, communications protocol switching program, and integrated circuit of wireless communications terminal
CN103268512A (en) * 2013-05-07 2013-08-28 上海卡美循环技术有限公司 Mobile phone protection shell and method for integrating anti-electromagnetic interference smart card in mobile phone protection shell

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FR2844078A1 (en) * 2002-08-30 2004-03-05 St Microelectronics Sa COMMUNICATION METHOD BY ANTENNA FOR CHIP CARD AND APPARATUS THEREOF
JP3800331B2 (en) 2002-10-22 2006-07-26 ソニー株式会社 Wireless communication circuit, wireless communication terminal and method, recording medium, and program
JP3993108B2 (en) * 2003-01-17 2007-10-17 ソニー・エリクソン・モバイルコミュニケーションズ株式会社 Wireless communication method and wireless communication terminal
JP2004227046A (en) * 2003-01-20 2004-08-12 Hitachi Ltd Portable information device
JP2004341895A (en) * 2003-05-16 2004-12-02 Sony Corp Ic card
JP2005078442A (en) * 2003-09-01 2005-03-24 Sony Corp Ic card, and its manufacturing method
JP2007116347A (en) * 2005-10-19 2007-05-10 Mitsubishi Materials Corp Tag antenna and mobile radio equipment
DE102008005795A1 (en) * 2008-01-23 2009-07-30 Soheil Hamedani Arrangement consisting of a mobile communication terminal and at least one RFID transponder
DE102009010549A1 (en) 2009-02-25 2010-09-16 Giesecke & Devrient Gmbh Purse or wallet for accepting credit cards
CN103365522B (en) * 2012-03-30 2016-03-30 宏碁股份有限公司 In conjunction with the contactor control device of magnetic induction antenna

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JPH10240880A (en) * 1997-02-26 1998-09-11 Rohm Co Ltd Ic card system and carriage system using the same
KR200198305Y1 (en) * 2000-03-08 2000-10-02 박준호 Rf card of sticker pattern
KR100678773B1 (en) * 2000-03-28 2007-02-05 조인호 A paying system of non-contacting type traffic card and refill system thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7796949B2 (en) 2004-05-21 2010-09-14 Panasonic Corporation Wireless communications terminal, communications protocol switching method, communications protocol switching program, and integrated circuit of wireless communications terminal
CN1771670B (en) * 2004-05-21 2011-08-31 松下电器产业株式会社 Wireless communications terminal, communications protocol switching method, communications protocol switching program, and integrated circuit of wireless communications terminal
CN103268512A (en) * 2013-05-07 2013-08-28 上海卡美循环技术有限公司 Mobile phone protection shell and method for integrating anti-electromagnetic interference smart card in mobile phone protection shell
CN103268512B (en) * 2013-05-07 2016-08-03 上海卡美循环技术有限公司 A kind of mobile phone protecting case and the method for the most integrated anti-electromagneticinterference interference smart card

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Publication number Publication date
WO2002056247A1 (en) 2002-07-18
JP2004527026A (en) 2004-09-02

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