Electronic security card and system for authenticating card owne

Details Electronic security card and system for authenticating card owne Electronic security card and system for authenticating card owne

1974-08-15

1976-01-20

Urynowicz, Jr., Stanley M.

Registers

Calculators

Input-output calculator to indicator, printer, etc.

340149A, 235 6112N, G11C 700, G11C 1900

Patent

active

039341224

ABSTRACT:
An electronic security card and system for authenticating ownership of the card is disclosed. The system comprises a security card and a terminal. The security card includes logic circuitry which is responsive to a plurality of input signals and which is operative to provide an output signal if the input signals are in a preselected sequence and to develop a feedback control signal which is applied to, and deactivates, the logic circuitry if the input signals are not in the preselected sequence. The terminal comprises a source of input signals, a switching network for selectively interconnecting the source to the logic circuitry so as to apply a sequence of input signals to the logic circuitry when the security card is received by the terminal, and an indicator responsive to the output signal and operative to provide an indication of the authenticity of the user of the security card. The logic circuitry includes a plurality of stages, each of which comprises an AND gate and a flip-flop, and which is arranged so that the signal developed at the output of one of the stages is applied to gate a preceding stage.

REFERENCES:
patent: 3637994 (1972-01-01), Ellingboe
patent: 3641316 (1972-02-01), Dethloff
patent: 3678251 (1972-07-01), Delpino
patent: 3702464 (1972-11-01), Castrucci
patent: 3831119 (1974-08-01), Ambrosio
patent: 3868057 (1975-02-01), Chavez

Affiliated with

Also associated with

Rating

Electronic security card and system for authenticating card owne does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic security card and system for authenticating card owne, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic security card and system for authenticating card owne will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1699669