Keypad-operated access control unit

Details Keypad-operated access control unit Keypad-operated access control unit

1986-02-04

1988-04-19

Bullock, B. J.

Tools and hardware

Locking or closing device

D14107

Patent

active

D02952556

REFERENCES:
patent: D230601 (1974-03-01), Cross et al.
patent: D248233 (1978-06-01), Dibenedetto
patent: D268029 (1983-02-01), Fisher
patent: D283406 (1986-04-01), Green, Jr.
patent: D285668 (1986-09-01), Tanaka et al.
patent: 3187528 (1965-06-01), Check

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