Contiguously matched magnetic sensor array and magnetic media for authentication of documents and products
US5764054A · kind A · utility
1Cited by
6References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Jun 19, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D1/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for detecting a magnetic pattern having a plurality of spaced magnetic areas includes an array of magnetic sensors which are configured and spaced from each other to detect the spaced magnetic areas of a magnetic pattern brought into contiguity with the array. Electrical circuitry connects the array of magnetic sensors in series and a single source is provided for supplying current to the array of magnetic sensors through the electrical circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.