Authentication device with key number memory

Details Authentication device with key number memory Authentication device with key number memory

1997-06-04

2000-02-01

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

34082554, 70278, H04Q 100

Patent

active

060208279

ABSTRACT:
The invention relates to a device for checking the user authorisation for access control devices, in particular locking devices for vehicles. The information emitted by the respective transponder (T1 . . . Tn) in key devices (B1 . . . Bn) in each case is compared to preset information, fixed by the secret code, in the control device, relevant for the respective key device (B1 . . . Bn), whereby

REFERENCES:
patent: 4509093 (1985-04-01), Stellberger
patent: 5523746 (1996-06-01), Gallagher
patent: 5552789 (1996-09-01), Schuermann
patent: 5724028 (1998-03-01), Prokup

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