Identity card having radioactive isotope of short half-life

Details Identity card having radioactive isotope of short half-life Identity card having radioactive isotope of short half-life

1974-07-03

1976-05-25

Urynowicz, Jr., Stanley M.

Registers

Calculators

Input-output calculator to indicator, printer, etc.

235 6112M, 235 617B, 235 6111D, 235 6111E, 340149A, 250271, 250493, G06K 1900, G06K 708

Patent

active

039596303

ABSTRACT:
An identity card contains a radioactive substance and information on the intensity of the radiation of said substance. When the card is used, for example in a banking transaction, the current intensity is measured and compared with the information on the intensity given on the card. If the current intensity and the given intensity agree, the card is to be considered genuine.

REFERENCES:
patent: 3092402 (1963-06-01), Reed
patent: 3295651 (1967-01-01), Klackowski et al.
patent: 3457391 (1969-07-01), Yamamoto
patent: 3564215 (1971-02-01), Pieples, Jr. et al.
patent: 3588379 (1971-06-01), Young et al.
patent: 3805067 (1974-04-01), Wing
IBM Tech. Disc. Bull., "Cooling Documents by Trace Element Inclusion, " by Tracy, Vol. 11, No. 11, Apr. 1969, p. 1394.

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