Article identifying system

Details Article identifying system Article identifying system

1988-03-01

1990-04-17

Pitts, Harold I.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235375, 235439, G06K 500

Patent

active

049182960

ABSTRACT:
An article identifying system comprises an ID device attached to an article to be identified and a write/read control apparatus to write and read data into and from the ID device. The control apparatus has an oscillator. The ID device has a resonance circuit. Data transmission is performed by the electromagnetic coupling of the oscillator and resonance circuit. The FSK modulation/demodulation are used in this data transmission. Preferably data is encoded by bi-phase code, f/2f code, bipolar code, or dicode code. An electric power can be also supplied from the control apparatus to the ID device by the continuous oscillation of the oscillator.

REFERENCES:
patent: 4249663 (1980-12-01), Solbodin
patent: 4473825 (1984-09-01), Walton
patent: 4546241 (1985-10-01), Walton

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