73630095
Nov 12, 1986
Oct 11, 1988
SECURITY SYSTEMS FOR COMPUTERS--NAMELY, A PRINTED CIRCUIT BOARD HAVING ELECTRONIC CIRCUITRY THEREON, A CARD READER CAPABLE OF READING AN ENCODED CARD, AND SOFTWARE, ALL OF WHICH ENABLE THE COMPUTER TO RESPOND ONLY TO A PRESELECTED ENCODED CARD AND RECEIPT OF AN INPUT SIGNAL CONTAINING A PRESELECTED IDENTIFICATION CODE
Electrical and Scientific Apparatus