CA2267457A1 - Multi-layer magnetic tag - Google Patents
Multi-layer magnetic tagInfo
- Publication number
- CA2267457A1 CA2267457A1 CA002267457A CA2267457A CA2267457A1 CA 2267457 A1 CA2267457 A1 CA 2267457A1 CA 002267457 A CA002267457 A CA 002267457A CA 2267457 A CA2267457 A CA 2267457A CA 2267457 A1 CA2267457 A1 CA 2267457A1
- Authority
- CA
- Canada
- Prior art keywords
- magnetic material
- magnetic
- magnetically
- layer magnetic
- magnetic tag
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V15/00—Tags attached to, or associated with, an object, in order to enable detection of the object
Abstract
A magnetic marker or tag is disclosed which comprises (a) a first magnetic material characterised by high permeability, low coercivity and a non-linear B-H characteristic; and (b) a second magnetic material which is capable of being permanently magnetised, said first and second magnetic materials being superimposed one on the other and advantageously being substantially coterminous. The second magnetic material is preferably of medium coercivity. Selected regions of said second magnetic material can carry magnetisation such as to magnetically divide the first magnetic material into a series of magnetically discrete zones, the length of said magnetically discrete zones and/or the lengths of said magnetised regions ("gaps") of said second material constituting elements of a code.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9620190.0A GB9620190D0 (en) | 1996-09-27 | 1996-09-27 | Improved methods for coding magnetic tags |
GB9620190.0 | 1996-09-27 | ||
PCT/GB1997/002690 WO1998013708A1 (en) | 1996-09-27 | 1997-09-29 | Multi-layer magnetic tag |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2267457A1 true CA2267457A1 (en) | 1998-04-02 |
CA2267457C CA2267457C (en) | 2004-05-25 |
Family
ID=10800602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002267457A Expired - Fee Related CA2267457C (en) | 1996-09-27 | 1997-09-29 | Multi-layer magnetic tag |
Country Status (14)
Country | Link |
---|---|
US (1) | US6204766B1 (en) |
EP (1) | EP0928430B1 (en) |
JP (1) | JP3646142B2 (en) |
KR (1) | KR100473428B1 (en) |
CN (1) | CN1149406C (en) |
AT (1) | ATE230495T1 (en) |
AU (1) | AU717142B2 (en) |
BR (1) | BR9712147A (en) |
CA (1) | CA2267457C (en) |
DE (1) | DE69718181T2 (en) |
ES (1) | ES2187823T3 (en) |
GB (1) | GB9620190D0 (en) |
RU (1) | RU2183846C2 (en) |
WO (1) | WO1998013708A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19858064A1 (en) * | 1998-12-16 | 2000-06-21 | Meto International Gmbh | Securing element for electronic article surveillance |
AU2002350977A1 (en) * | 2001-12-27 | 2003-07-30 | Flying Null Limited | Verification key for replacement parts |
US7352771B2 (en) * | 2002-10-08 | 2008-04-01 | Colder Products Company | Data collision detection device and method |
GB0323349D0 (en) * | 2003-10-06 | 2003-11-05 | Linksure Ltd | Verification means |
US7230537B2 (en) * | 2004-04-15 | 2007-06-12 | Matsushita Electric Industrial Co., Ltd. | Product identification system using IC tag units, and a digital content management system |
US7023345B2 (en) * | 2004-05-03 | 2006-04-04 | Sensormatic Electronics Corporation | Enhancing magneto-impedance modulation using magnetomechanical resonance |
CA2611792A1 (en) * | 2005-06-30 | 2007-01-11 | Nova Chemicals Inc. | Magnetic composite materials and articles containing such |
AT511332B1 (en) * | 2011-08-11 | 2012-11-15 | Suess Dieter Dr | METHOD AND DEVICE FOR DISCRIMINATORY DETECTION OF CONTAINERS FOR THE PREPARATION OF FOODS IN EXTRACTION MACHINES USING MAGNETIZABLE MATERIALS |
US10325439B2 (en) | 2015-07-03 | 2019-06-18 | Custom Security Industries, Inc. | Article identification reader, marker element for article identification and method of article identification |
RU2615329C1 (en) * | 2015-12-09 | 2017-04-04 | Публичное акционерное общество "Транснефть" (ПАО "Транснефть") | Method of tubular products marking, tubular product with marking and identification system of tubular products |
EP4085827A1 (en) | 2016-07-12 | 2022-11-09 | Magnetic Insight, Inc. | Magnetic particle imaging |
EP3490672B1 (en) | 2016-07-28 | 2021-03-03 | Sun Nuclear Corporation | Beam angle direction determination |
EP4309575A3 (en) | 2017-08-16 | 2024-04-10 | The Regents Of The University Of California | Pulsed magnetic particle imaging systems and methods |
WO2020186185A1 (en) | 2019-03-13 | 2020-09-17 | Magnetic Insight, Inc. | Magnetic particle actuation |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4779076A (en) * | 1987-05-20 | 1988-10-18 | Controlled Information Corp. | Deactivatable coded marker and magnetic article surveillance system |
IT1211227B (en) | 1987-07-21 | 1989-10-12 | Urmet Spa | VALVE VALVE DISPENSER SELECTIVE LOCKING PRESSURE BALANCER FOR TIRES OF TWIN-WHEELED VEHICLES EQUIPPED WITH MINIMUM ON-BOARD SIGNALING SYSTEM |
GB8817855D0 (en) * | 1988-07-27 | 1988-09-01 | Emi Plc Thorn | Electromagnetic identification system |
US5582924A (en) * | 1989-01-09 | 1996-12-10 | Esselte Meto International Gmbh | Magnetic materials for security applications |
US5580664A (en) * | 1992-12-23 | 1996-12-03 | Minnesota Mining And Manufacturing Company | Dual status thin-film eas marker having multiple magnetic layers |
JPH06273144A (en) | 1993-03-23 | 1994-09-30 | Nisshin Steel Co Ltd | Method for classifying product by degree of surface defect |
US5643686A (en) | 1994-01-06 | 1997-07-01 | Tokyo Magnetic Printing Co., Ltd. | Magnetic recording medium and method for manufacturing the same |
JP3051644B2 (en) * | 1994-10-13 | 2000-06-12 | 東京磁気印刷株式会社 | Manufacturing method of magnetic recording medium |
KR960000557A (en) | 1994-06-23 | 1996-01-25 | 배순훈 | Vehicle automatic temperature control system using air curtain |
PL317934A1 (en) | 1994-06-28 | 1997-04-28 | Skanska Teknik Ab | Thermally insulating external building wall |
US5554974A (en) * | 1994-11-23 | 1996-09-10 | International Business Machines Corporation | Encodable tag with radio frequency readout |
GB9506909D0 (en) * | 1995-04-04 | 1995-05-24 | Scient Generics Ltd | Spatial magnetic interrogation system |
RU2183033C2 (en) * | 1995-07-17 | 2002-05-27 | Флайинг Налл Лимитед | Improvements related to magnetic tags or labels |
GB9608329D0 (en) | 1996-04-23 | 1996-06-26 | Scient Genarics Ltd | Improved methods for coding magnetic tags |
US5821859A (en) * | 1996-06-07 | 1998-10-13 | Ibm Corporation | Concealed magnetic ID code and antitheft tag |
DE19642225A1 (en) * | 1996-10-12 | 1998-04-16 | Esselte Meto Int Gmbh | Securing element for electronic article surveillance and method for producing a securing element |
-
1996
- 1996-09-27 GB GBGB9620190.0A patent/GB9620190D0/en active Pending
-
1997
- 1997-09-29 WO PCT/GB1997/002690 patent/WO1998013708A1/en active IP Right Grant
- 1997-09-29 AT AT97943975T patent/ATE230495T1/en not_active IP Right Cessation
- 1997-09-29 US US09/269,350 patent/US6204766B1/en not_active Expired - Fee Related
- 1997-09-29 CA CA002267457A patent/CA2267457C/en not_active Expired - Fee Related
- 1997-09-29 AU AU45629/97A patent/AU717142B2/en not_active Ceased
- 1997-09-29 BR BR9712147-9A patent/BR9712147A/en not_active IP Right Cessation
- 1997-09-29 CN CNB971992037A patent/CN1149406C/en not_active Expired - Fee Related
- 1997-09-29 EP EP97943975A patent/EP0928430B1/en not_active Expired - Lifetime
- 1997-09-29 KR KR10-1999-7002659A patent/KR100473428B1/en not_active IP Right Cessation
- 1997-09-29 ES ES97943975T patent/ES2187823T3/en not_active Expired - Lifetime
- 1997-09-29 RU RU99108676/28A patent/RU2183846C2/en not_active IP Right Cessation
- 1997-09-29 JP JP51543598A patent/JP3646142B2/en not_active Expired - Fee Related
- 1997-09-29 DE DE69718181T patent/DE69718181T2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69718181D1 (en) | 2003-02-06 |
EP0928430B1 (en) | 2003-01-02 |
GB9620190D0 (en) | 1996-11-13 |
JP2001501005A (en) | 2001-01-23 |
EP0928430A1 (en) | 1999-07-14 |
JP3646142B2 (en) | 2005-05-11 |
DE69718181T2 (en) | 2003-05-15 |
CN1235677A (en) | 1999-11-17 |
AU717142B2 (en) | 2000-03-16 |
KR20000048703A (en) | 2000-07-25 |
ES2187823T3 (en) | 2003-06-16 |
CN1149406C (en) | 2004-05-12 |
CA2267457C (en) | 2004-05-25 |
AU4562997A (en) | 1998-04-17 |
BR9712147A (en) | 2001-12-04 |
ATE230495T1 (en) | 2003-01-15 |
US6204766B1 (en) | 2001-03-20 |
KR100473428B1 (en) | 2005-03-07 |
WO1998013708A1 (en) | 1998-04-02 |
RU2183846C2 (en) | 2002-06-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |