Registers – Systems controlled by data bearing records – Credit or identification card systems
Patent
1992-07-07
1993-04-13
Pitts, Harold
Registers
Systems controlled by data bearing records
Credit or identification card systems
235380, 235384, G06K 500, G07C 900, G07F 708, G07B 1504
Patent
active
052025500
ABSTRACT:
For automated communication in a limited acquisition space, for example in order to identify or check an access authorization, use is made of active data supports which comprise a transmitter (15), a receiver (16), a read-write memory, an electric clock, a computer, a display and a power source (7). The checking station is also provided with a transmitter-receiver to check and possibly modify the data. Each transmitter-receiver has a limited communication space, of which the maximum extent is less than the minimum extent of the acquisition space. In this way it is not necessary to plug in the data support, of which a precise point must, however, be deliberately brought close to the checking station. In this way a definite coordination between the checking station and a further data support is prevented.
REFERENCES:
patent: 3806874 (1974-04-01), Ehart
patent: 4325146 (1982-04-01), Lennington
patent: 4338587 (1982-06-01), Ghiappetti
patent: 4399437 (1983-08-01), Goldman
patent: 4476468 (1984-10-01), Goldman
patent: 4501958 (1985-02-01), Glize
patent: 4555618 (1985-11-01), Riskin
patent: 4853524 (1989-08-01), Vamaguchi
Kocznar Wolfram
Wallerstorfer Kurt
Pitts Harold
Skidata Computer Gesellschaft m.b.H.
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