Electronic identification and recognition system with code chang

Details Electronic identification and recognition system with code chang Electronic identification and recognition system with code chang

1981-09-16

1983-06-14

Rubinson, G. Z.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235449, 235439, 235488, 3408253, 34082572, 34082531, 343 65R, 343 65SS, G06K 500

Patent

active

043885241

ABSTRACT:
An electronic identification and recognition system in which the recognition portion includes a voltage controlled oscillator which sweeps over a range of frequencies. The identification portion resonates at certain frequencies determined by a variable reactance in the resonant circuit in the identifier which is responsive to bits from a sequential data register. The bits result in the on-and-off switching of the variable reactance which modifies the resonant frequency in the identification portion or modifies the frequency of an oscillator in the identification portion. The changes and sequence of changes in the resonant frequency are detected and recorded by the recognition portion such that the internal code of the identifier is determined.

REFERENCES:
patent: 3752960 (1973-08-01), Walton
patent: 3816708 (1974-06-01), Walton
patent: 3958105 (1976-05-01), Sidlauskas
patent: 4223830 (1980-09-01), Walton
patent: 4236068 (1980-11-01), Walton

Affiliated with

Also associated with

Rating

Electronic identification and recognition system with code chang 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 identification and recognition system with code chang, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic identification and recognition system with code chang will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-165585