| 7315253 |
Security device and transponder |
Stefan Alexander Pijanowski, Peter Antony Farrar, Anthony Henry Joseph Fraser, Robert Johnston, Ross Peter Jones |
2008-01-01 |
| 6595419 |
Shielded magnetic reading devices |
Richard Doyle |
2003-07-22 |
| 6491221 |
Security documents |
David Arnold, Michael John Abrams |
2002-12-10 |
| 6486655 |
Magnetic position sensing techniques |
— |
2002-11-26 |
| 6371379 |
Magnetic tags or markers |
Andrew Dames |
2002-04-16 |
| 6369965 |
Magnetic interrogation techniques |
Andrew Dames |
2002-04-09 |
| 6230972 |
Magnetic reading devices |
Andrew Dames, Alexander W. McKinnon |
2001-05-15 |
| 6204766 |
Multi-layer magnetic tag |
Christopher John Coggill |
2001-03-20 |
| 6076007 |
Surgical devices and their location |
Mark England, Andrew Dames |
2000-06-13 |
| 6054924 |
Magnetic markers |
Andrew Dames |
2000-04-25 |
| 5965214 |
Methods for coding magnetic tags |
Christopher John Coggill |
1999-10-12 |
| 5459451 |
Electronic article surveillance system with enhanced geometric arrangement |
Andrew Dames |
1995-10-17 |
| 5414410 |
Method and system for detecting a marker |
Daffyd G. Davies, Andrew Dames |
1995-05-09 |
| 5208580 |
Security tag attachment |
— |
1993-05-04 |
| 5049856 |
Antipilferage systems |
— |
1991-09-17 |
| 4999609 |
Antipilferage tags having an acoustic resonator chamber |
— |
1991-03-12 |
| 4992776 |
Antipilferage tags and their use |
— |
1991-02-12 |
| 4940966 |
Article detection and/or recognition using magnetic devices |
Robert M. Pettigrew, Stephen H. Chambers, Dafydd G. Davies |
1990-07-10 |