Security paper, method and device for checking the...

Registers – Systems controlled by data bearing records – Banking systems

Reexamination Certificate

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C235S492000, C283S057000

Reexamination Certificate

active

06918535

ABSTRACT:
A safety paper with an embedded electronic circuit (1, 4, 7) is used to create more effective forgery-proof securities such as bank notes. In order to check authenticity, a carrier-frequency signal is transmitted to the circuit and an output signal representing an authenticating feature is emitted from raid circuit in response to said input signal and detected.

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Currency With an Integrated Chip, Oct. 1, 1989, IBM Technical Disclosure Bulletin, vol. 32, Issue No. 5A, p. 427.

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