Registers – Coded record sensors – Particular sensor structure
Patent
1986-03-21
1988-08-30
Lev, Robert
Registers
Coded record sensors
Particular sensor structure
235493, 235380, 235454, 382 50, 250205, 34082534, H01Q 900
Patent
active
047679190
ABSTRACT:
The present invention specifies a method for the verification of authenticity in a data carrier (1) by measuring permeability to an electromagnetic radiation in at least one region of the data carrier (1). Permeability is scanned over a regional area of the data carrier by means of a radiation detector (7). The output signal of the detector (7) is coded and co-inscribed as additional information in a store of the data carrier with the information data during the initial inscribing of these data. In the reading and authenticity check scanning operation this information is compared with a corresponding additional information stored during the original data inscription.
REFERENCES:
patent: 3836754 (1974-09-01), Toye et al.
patent: 3916194 (1975-10-01), Novak et al.
patent: 4066910 (1978-01-01), Swift
Bauer Siegfried
Stockburger Hermann
Brown Donald
Lev Robert
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