Digital or key card operated electronic door lock

Details Digital or key card operated electronic door lock Digital or key card operated electronic door lock

1993-08-06

1994-11-01

Vinson, Brian N.

Tools and hardware

Locking or closing device

Patent

active

D03519821

REFERENCES:
patent: D290442 (1987-06-01), Floyd et al.
patent: D305861 (1990-02-01), Kautt
patent: D312957 (1990-12-01), Huang
patent: D313159 (1990-12-01), Kautt
patent: 3187528 (1965-06-01), Check
patent: 4671086 (1987-06-01), Fogleman et al.
patent: 4972691 (1990-11-01), Knight

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