Authentication document system
US4630845A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 1983 |
| Grant date | Dec 23, 1986 |
| Priority date | — |
| Expiry date | Aug 25, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/12
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system is disclosed including an authentication device as in the form of a document that is difficult to counterfeit and is individually identifiable. A sheet of medium comprising the document incorporates a section with a characteristic that specifically identifies the document as, for example, a section of varying translucency which will modulate a beam of light. Elements of such character identify the document as an individual unit. A visible mark or reference indicia on the document specifies the section of the document that serves to provide the characteristic identification. The visible mark is magnetic and records specific locations in the section and data on the document characteristic at such locations. An associated system is disclosed for producing and testing authenticator devices whereby the characteristic is sensed initially to be magnetically recorded in the mark and subsequently to be compared with the magnetically recorded data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.