Anticounterfeit card-sensing mechanism
US4723071A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 8, 1985 |
| Grant date | Feb 2, 1988 |
| Priority date | — |
| Expiry date | May 8, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/12
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A transducer apparatus for use with cards bearing a magnetic recording stripe and having an optically sensible anticounterfeit uniqueness characteristic, the apparatus including a sensor for the anticounterfeit characteristic which scans the card by a small discrete window of perception, pixel. The apparatus isolates predetermined areas of perception for the card, so as to verify on the basis of signals from a prior observation recorded by the magnetic stripe. Areas of perception, pixel size, are less than one sixty-fourth of a square inch. The magnetic sensing head of the apparatus is mounted with the anticounterfeit sensor to accommodate common resilient displacement with movement relative to a card.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.