WO2005006248A1 - Tag for radio frequency identification system - Google Patents

Tag for radio frequency identification system Download PDF

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Publication number
WO2005006248A1
WO2005006248A1 PCT/IB2004/051187 IB2004051187W WO2005006248A1 WO 2005006248 A1 WO2005006248 A1 WO 2005006248A1 IB 2004051187 W IB2004051187 W IB 2004051187W WO 2005006248 A1 WO2005006248 A1 WO 2005006248A1
Authority
WO
WIPO (PCT)
Prior art keywords
tag
transponder
carrier
antenna arrangement
electronic circuitry
Prior art date
Application number
PCT/IB2004/051187
Other languages
French (fr)
Inventor
Stanley Clarence Mccann
Original Assignee
Stanley Clarence Mccann
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 Stanley Clarence Mccann filed Critical Stanley Clarence Mccann
Publication of WO2005006248A1 publication Critical patent/WO2005006248A1/en

Links

Classifications

    • 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
    • G06K19/07758—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 arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
    • 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
    • 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

Definitions

  • This invention relates to radio frequency identification systems (RFID) and more particularly to a tag comprising a transponder for use in such a system, a system comprising tags and a method of producing tags.
  • RFID radio frequency identification systems
  • RFID systems are well known in the art.
  • the reading range of the known systems between a reader of the system and a transponder of the system is severely impaired by certain host articles for the transponders such as metal host articles or host containers containing a liquid.
  • a tag for use in a radio frequency identification (RFID) system, the tag comprising a transponder comprising electronic circuitry connected to an antenna arrangement, the transponder being carried by a carrier comprising a body, the body being configured to encapsulate at least part of the electronic circuitry and to provide a dielectric spacer between the antenna arrangement and a host article.
  • RFID radio frequency identification
  • the electronic circuitry by be provided on a chip and the chip may be encapsulated by the body.
  • the chip and antenna arrangement are encapsulated or embedded in the body.
  • the transponder may be any one or more of the following: a read only transponder, a read/write transponder, programmable transponder, passive transponder, active transponder, semi active transponder, operating at about 13.5MHz, operating at about 400MHz, operating in the 800MHz to 1100MHz band and even at about 2.45GHz.
  • the transponder is a passive transponder which in use derives power from an energizing signal transmitted by a reader or interrogator of the RFID system.
  • the carrier body may comprise attachment means for attaching the carrier to the host article.
  • the carrier may be of unitary construction.
  • the carrier may be cast or moulded integrally from a suitable dielectric material such as a resinous material, epoxy, plastics material, cement, concrete wood, glass, paper, wax, cloth straw, rubber etc.
  • the material is a high impact resistant material such as high density polyethylene.
  • the aforementioned spacer may in some embodiments comprise an air gap.
  • the invention further includes within its scope a carrier for a transponder as herein defined and/or described.
  • the invention also extends to a radio frequency identification system comprising at least one reader and a plurality of tags as herein defined and/or described.
  • a method of producing a radio frequency (RF) tag comprising the steps of: providing an RF transponder comprising electronic circuitry and an antenna arrangement; - encapsulating at least part of the circuitry in a dielectric body of a carrier for the transponder; and configuring the body to provide a dielectric spacer between the antenna arrangement and a host article on which the tag is carried in use.
  • RF radio frequency
  • the method may further comprise the step of configuring the carrier body to provide integral means for attaching the carrier to the host article.
  • figure 1 is a block diagram of a radio frequency identification system comprising tags according to the invention
  • figure 2 is an exploded view of a gas bottle and tag according to the invention
  • figure 3 is a perspective view of the tag mounted on the gas bottle
  • figure 4 is a section on line IV in figure 2
  • figure 5 is a section on line V in figure 2
  • figure 6 is a diagrammatic perspective view of a second embodiment of the tag according to the invention
  • figure 7 is a section on line VII in figure 6.
  • a radio frequency identification (RFID) system is generally designated by the reference numeral 10 in figure 1.
  • the system 10 comprises at least one reader or interrogator 12 and a plurality of tags 14.1 to 14.n of a tag population 14.
  • the tags are attached to or otherwise associated with respective host articles 16.1 to 1 ⁇ .n.
  • the reader broadcasts an energizing or interrogation signal 18 towards the tag population 14 on the host articles.
  • Each tag responds to the signal, for example by backscatter modulating the energizing signal, with a respective response signal 20.1 to 20.n carrying data stored in a memory arrangement of the transponder.
  • the reader sequentially locks onto these response signals and reads the data.
  • the data so read is used in known manner by the reader to count and/or identify the tags 14.1 to 14.n and hence the host articles.
  • the tags are similar in configuration and therefore only tag 14.1 will be described in more detail hereinafter.
  • the tag comprises an RF transponder 22 comprising electronic circuitry integrated on a chip 24, typically on ASIC.
  • the chip is connected to an antenna arrangement 26.
  • the transponder is provided on a carrier 28, sometimes also referred to as secondary packaging, comprising a body 30 as will hereinafter be described.
  • the body 30 comprises attachment means 32 for securing the body to the host article 16.1 , as will also be described hereinafter.
  • a first embodiment of the tag 14.1 according to the invention and for use on a host article 16.1 in the form of a gas bottle is shown in figures 2 to 5.
  • the gas bottle 16.1 comprises a metal body 42 and at one end thereof a metal valve mechanism 44 defining an outlet 46 and a manually operable metal wheel 48 for opening and closing the valve.
  • the mechanism 44 is circumscribed by a protective metal shroud 50 comprising a top member 52 having a shape in the form of a circle segment.
  • the body 30 of the tag 14.1 is moulded from a dielectric material such as high density polyethylene.
  • the attachment means 32 comprises a channel 54 defined in the body between parts 56 and 58 of the body.
  • the body is a pressure and tight fit on shroud 50 with member 52 received in channel 54, so that parts 56 and .58 straddle member 52 and tightly clamp the body onto the member 52, under the influence of plastic memory in the body.
  • the carrier 28 is of unitary construction in that the attachment means 32 is formed integrally with the body 30.
  • the transponder 22 is embedded in the body 30.
  • Part of the dielectric body 30 in use provides a dielectric spacer 60 of width W between the antenna arrangement 26 and the metal member 52.
  • This member may in use function as a reflector or backplane associated with the antenna arrangement.
  • the width W may be determined empirically and may differ for different kinds and configurations of reflectors 52 and/or dielectric materials for body 30. In some applications a width W of about 15mm was found to give surprisingly good results in terms of reading range between reader 12 and transponder 14.1.
  • the body 30 may be colour coded or given a unique shape for articles of a particular kind, for example the unique shape and configuration of the tag body 30 shown in figures 2 and 3 for gas bottles.
  • a second embodiment of the tag 114.1 according to the invention is shown in figures 6 and 7.
  • the transponder 22 comprising chip 24 and antenna arrangement 26 is embedded in a carrier body 30.
  • the body is attachable to a host article 16.1 by double sided adhesive tape 62, for example.
  • the distance W provided by part 64 of the body 30 between the antenna arrangement 26 and the host article may be determined empirically. With a suitable distance W, the metal bar 16.1 may act as a reflector or backplane for the antenna arrangement 26 of the transponder 22.
  • the resulting reading ranges between the reader 12 and the tags to be read have been found surprisingly far to exceed the realistically expected ranges.
  • the carrier 28 provides protection for at least part of the circuitry 24, enables the transponder 22 to be mounted on a host article 16.1 and provides dielectric separation W between the antenna arrangement 26 and the host article 16.1 which may be made of a metal and/or contain a liquid. It has been found that with suitable selection of the separation W, reading range reduction as a result of the adjacent host may not only be reduced, but the range may even be improved compared to that for free space.
  • Tags according to the invention may be configured to be hosted by host articles such as gas bottles, beer barrels, fire extinguishers, roll cages, waste bins, other returnable and reusable containers, cable drums, wheels, valve mechanisms, vehicles, plant, trailers, licence plates, road furniture, utility poles, rolling stock, pallets and animals.
  • the tag may be attached to the host article by crimping, gluing, welding, press fitting, tying onto, bonding, wrapping, screwing, bolting, clamping etc.
  • the antenna arrangement 26 may comprise any suitable antenna arrangement such as a dipole, folded dipole, shortened dipole, loaded dipole etc.
  • the dipole may have any suitable configuration such as the linear arrangement of figures 6 and 7.
  • non-linear configurations may be utilized such as the part circle configuration best shown in figure 5.
  • angled, preferably right angled configurations, with equal or unequal leg lengths may be used.
  • the circular and angled configurations make the tag polarization independent on the plane of the circle or angled configuration.

Abstract

A tag (14.1) for use in a radio frequency identification (RFID) system comprises a transponder (22) comprising electronic circuitry (24) connected to an antenna arrangement (26). The transponder is carried by a carrier (2.8) comprising a body (30). The body comprises attachment means (54,56) and (58) for attaching the body to a host article (16.1) and the body being configured to encapsulate at least part of the electronic circuitry and to provide a dielectric spacer (60) between the antenna arrangement (26) and the host article.

Description

TAG FOR RADIO FREQUENCY IDENTIFICATION SYSTEM
TECHNICAL FIELD
This invention relates to radio frequency identification systems (RFID) and more particularly to a tag comprising a transponder for use in such a system, a system comprising tags and a method of producing tags.
RFID systems are well known in the art. However, the reading range of the known systems between a reader of the system and a transponder of the system is severely impaired by certain host articles for the transponders such as metal host articles or host containers containing a liquid.
OBJECT OF THE INVENTION Accordingly, it is an object of the present invention to provide an alternative tag comprising a transponder, a carrier for the transponder, an RFID system and a method of producing the tag with which the applicant believes the aforementioned disadvantages may at least be alleviated.
SUMMA OF THE 1MVEMT1QM
According to the invention there is provided a tag for use in a radio frequency identification (RFID) system, the tag comprising a transponder comprising electronic circuitry connected to an antenna arrangement, the transponder being carried by a carrier comprising a body, the body being configured to encapsulate at least part of the electronic circuitry and to provide a dielectric spacer between the antenna arrangement and a host article.
The electronic circuitry by be provided on a chip and the chip may be encapsulated by the body. In a preferred embodiment the chip and antenna arrangement are encapsulated or embedded in the body.
The transponder may be any one or more of the following: a read only transponder, a read/write transponder, programmable transponder, passive transponder, active transponder, semi active transponder, operating at about 13.5MHz, operating at about 400MHz, operating in the 800MHz to 1100MHz band and even at about 2.45GHz. In a preferred embodiment, the transponder is a passive transponder which in use derives power from an energizing signal transmitted by a reader or interrogator of the RFID system.
The carrier body may comprise attachment means for attaching the carrier to the host article. The carrier may be of unitary construction. The carrier may be cast or moulded integrally from a suitable dielectric material such as a resinous material, epoxy, plastics material, cement, concrete wood, glass, paper, wax, cloth straw, rubber etc. In one presently preferred embodiment, the material is a high impact resistant material such as high density polyethylene. The aforementioned spacer may in some embodiments comprise an air gap.
The invention further includes within its scope a carrier for a transponder as herein defined and/or described.
The invention also extends to a radio frequency identification system comprising at least one reader and a plurality of tags as herein defined and/or described.
Still further included in the scope of the invention is a method of producing a radio frequency (RF) tag, the method comprising the steps of: providing an RF transponder comprising electronic circuitry and an antenna arrangement; - encapsulating at least part of the circuitry in a dielectric body of a carrier for the transponder; and configuring the body to provide a dielectric spacer between the antenna arrangement and a host article on which the tag is carried in use.
The method may further comprise the step of configuring the carrier body to provide integral means for attaching the carrier to the host article. BRIEF DESCRIPTION OF THE ACCOMPANYING DIAGRAMS
The invention will now further be described, by way of example only, with reference to the accompanying diagrams, wherein figure 1 is a block diagram of a radio frequency identification system comprising tags according to the invention; figure 2 is an exploded view of a gas bottle and tag according to the invention; figure 3 is a perspective view of the tag mounted on the gas bottle; figure 4 is a section on line IV in figure 2; figure 5 is a section on line V in figure 2; figure 6 is a diagrammatic perspective view of a second embodiment of the tag according to the invention; and figure 7 is a section on line VII in figure 6.
DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION
A radio frequency identification (RFID) system is generally designated by the reference numeral 10 in figure 1.
The system 10 comprises at least one reader or interrogator 12 and a plurality of tags 14.1 to 14.n of a tag population 14. In use, the tags are attached to or otherwise associated with respective host articles 16.1 to 1^.n. During operation, the reader broadcasts an energizing or interrogation signal 18 towards the tag population 14 on the host articles. Each tag responds to the signal, for example by backscatter modulating the energizing signal, with a respective response signal 20.1 to 20.n carrying data stored in a memory arrangement of the transponder. The reader sequentially locks onto these response signals and reads the data. The data so read is used in known manner by the reader to count and/or identify the tags 14.1 to 14.n and hence the host articles.
The tags are similar in configuration and therefore only tag 14.1 will be described in more detail hereinafter. The tag comprises an RF transponder 22 comprising electronic circuitry integrated on a chip 24, typically on ASIC. The chip is connected to an antenna arrangement 26. The transponder is provided on a carrier 28, sometimes also referred to as secondary packaging, comprising a body 30 as will hereinafter be described. The body 30 comprises attachment means 32 for securing the body to the host article 16.1 , as will also be described hereinafter.
A first embodiment of the tag 14.1 according to the invention and for use on a host article 16.1 in the form of a gas bottle is shown in figures 2 to 5. The gas bottle 16.1 comprises a metal body 42 and at one end thereof a metal valve mechanism 44 defining an outlet 46 and a manually operable metal wheel 48 for opening and closing the valve. The mechanism 44 is circumscribed by a protective metal shroud 50 comprising a top member 52 having a shape in the form of a circle segment. The body 30 of the tag 14.1 is moulded from a dielectric material such as high density polyethylene. As best shown in figure 4, the attachment means 32 comprises a channel 54 defined in the body between parts 56 and 58 of the body. The body is a pressure and tight fit on shroud 50 with member 52 received in channel 54, so that parts 56 and .58 straddle member 52 and tightly clamp the body onto the member 52, under the influence of plastic memory in the body. Hence, the carrier 28 is of unitary construction in that the attachment means 32 is formed integrally with the body 30.
As best shown in figures 4 and 5, the transponder 22 is embedded in the body 30. Part of the dielectric body 30 in use provides a dielectric spacer 60 of width W between the antenna arrangement 26 and the metal member 52. This member may in use function as a reflector or backplane associated with the antenna arrangement. The width W may be determined empirically and may differ for different kinds and configurations of reflectors 52 and/or dielectric materials for body 30. In some applications a width W of about 15mm was found to give surprisingly good results in terms of reading range between reader 12 and transponder 14.1. The body 30 may be colour coded or given a unique shape for articles of a particular kind, for example the unique shape and configuration of the tag body 30 shown in figures 2 and 3 for gas bottles. A second embodiment of the tag 114.1 according to the invention is shown in figures 6 and 7. The transponder 22 comprising chip 24 and antenna arrangement 26 is embedded in a carrier body 30. The body is attachable to a host article 16.1 by double sided adhesive tape 62, for example. The distance W provided by part 64 of the body 30 between the antenna arrangement 26 and the host article may be determined empirically. With a suitable distance W, the metal bar 16.1 may act as a reflector or backplane for the antenna arrangement 26 of the transponder 22. The resulting reading ranges between the reader 12 and the tags to be read have been found surprisingly far to exceed the realistically expected ranges.
Hence, the carrier 28 according to the invention provides protection for at least part of the circuitry 24, enables the transponder 22 to be mounted on a host article 16.1 and provides dielectric separation W between the antenna arrangement 26 and the host article 16.1 which may be made of a metal and/or contain a liquid. It has been found that with suitable selection of the separation W, reading range reduction as a result of the adjacent host may not only be reduced, but the range may even be improved compared to that for free space.
Tags according to the invention may be configured to be hosted by host articles such as gas bottles, beer barrels, fire extinguishers, roll cages, waste bins, other returnable and reusable containers, cable drums, wheels, valve mechanisms, vehicles, plant, trailers, licence plates, road furniture, utility poles, rolling stock, pallets and animals. The tag may be attached to the host article by crimping, gluing, welding, press fitting, tying onto, bonding, wrapping, screwing, bolting, clamping etc.
The antenna arrangement 26 may comprise any suitable antenna arrangement such as a dipole, folded dipole, shortened dipole, loaded dipole etc. The dipole may have any suitable configuration such as the linear arrangement of figures 6 and 7. In other tags, non-linear configurations may be utilized such as the part circle configuration best shown in figure 5. In yet other embodiments angled, preferably right angled configurations, with equal or unequal leg lengths may be used. The circular and angled configurations make the tag polarization independent on the plane of the circle or angled configuration.

Claims

CLAIMS:
1. A tag for use in a radio frequency identification (RFID) system, the tag comprising a transponder comprising electronic circuitry connected to an antenna arrangement, the transponder being carried by a carrier comprising a body, the body being configured to encapsulate at least part of the electronic circuitry and to provide a dielectric spacer between the antenna arrangement and a host article.
2. A tag as claimed in claim 1 wherein the body is configured to comprise attachment means for attaching the carrier to the host article.
3. A tag as claimed in claim 2 wherein the body and attachment means are of unitary construction.
4. A tag as claimed in claim 3 wherein the body is cast from a suitable dielectric material.
5. A tag as claimed in any one of claims 1 to 4 wherein the electronic circuitry is provided on a chip and the chip is encapsulated by the body.
6. A tag as claimed in claim 5 wherein the chip and antenna arrangement are encapsulated by the body.
7. A tag as claimed in any one of claims 1 to 6 wherein the transponder is a passive transponder which in use derives power from an energizing signal transmitted by a reader of the RFID system.
8. A carrier for a transponder comprising electronic circuitry and an antenna arrangement, the carrier comprising a body configured to encapsulate at least part of the electronic circuitry and to provide a dielectric spacer between the antenna arrangement and a host article on which the carrier is mounted in use.
9. A radio frequency identification system comprising at least one reader and a plurality of tags as claimed in any one of claims 1 to 7.
10. A method of producing a radio frequency (RF) tag, the method comprising the steps of: - providing an RF transponder comprising electronic circuitry and an antenna arrangement; - encapsulating at least part of the circuitry in a dielectric body of a carrier for the transponder; and - configuring the body to provide a dielectric spacer between the antenna arrangement and a host article in use.
11. A method as claimed in claim 10 comprising the step of configuring the carrier body to provide integral means for attaching the carrier to the host article.
PCT/IB2004/051187 2003-07-09 2004-07-09 Tag for radio frequency identification system WO2005006248A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2003/5294 2003-07-09
ZA200305294 2003-07-09

Publications (1)

Publication Number Publication Date
WO2005006248A1 true WO2005006248A1 (en) 2005-01-20

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ZA (1) ZA200601242B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007141733A2 (en) * 2006-06-09 2007-12-13 Idtek Track-And-Trace Sa Bottle of gas including a transponder
EP1884888A1 (en) * 2005-05-25 2008-02-06 International Business Machines Corporation Id tag package and rfid system
US7669318B2 (en) 2004-09-22 2010-03-02 Avery Dennison Corporation High-speed RFID circuit placement method
US7874493B2 (en) 2005-12-22 2011-01-25 Avery Dennison Corporation Method of manufacturing RFID devices
US8246773B2 (en) 2002-01-18 2012-08-21 Avery Dennison Corporation RFID label technique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19510458A1 (en) * 1995-03-24 1996-09-26 L & S Logistic & Software Gmbh Microchip and coil transponder device for mounting on container
US20020031997A1 (en) * 1998-05-19 2002-03-14 Lawler Casimir E. Machine readable tag
WO2002025583A1 (en) * 2000-09-22 2002-03-28 Gemplus Contact-free electronic label for product with conductive surface

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19510458A1 (en) * 1995-03-24 1996-09-26 L & S Logistic & Software Gmbh Microchip and coil transponder device for mounting on container
US20020031997A1 (en) * 1998-05-19 2002-03-14 Lawler Casimir E. Machine readable tag
WO2002025583A1 (en) * 2000-09-22 2002-03-28 Gemplus Contact-free electronic label for product with conductive surface

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9495632B2 (en) 2001-02-02 2016-11-15 Avery Dennison Corporation RFID label technique
US8246773B2 (en) 2002-01-18 2012-08-21 Avery Dennison Corporation RFID label technique
US7669318B2 (en) 2004-09-22 2010-03-02 Avery Dennison Corporation High-speed RFID circuit placement method
EP1884888A1 (en) * 2005-05-25 2008-02-06 International Business Machines Corporation Id tag package and rfid system
EP1884888A4 (en) * 2005-05-25 2009-08-19 Ibm Id tag package and rfid system
US7874493B2 (en) 2005-12-22 2011-01-25 Avery Dennison Corporation Method of manufacturing RFID devices
WO2007141733A2 (en) * 2006-06-09 2007-12-13 Idtek Track-And-Trace Sa Bottle of gas including a transponder
WO2007141733A3 (en) * 2006-06-09 2008-05-02 Idtek Track And Trace Sa Bottle of gas including a transponder

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