Elevator floor registration button

Details Elevator floor registration button Elevator floor registration button

1977-04-27

1980-01-15

Lucas, Susan J.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Elevator signal or call unit

D1006

Patent

active

D02539403

REFERENCES:
patent: D214705 (1969-07-01), Brounn
patent: 3952837 (1976-04-01), Rice
Design, 11-1957, p. 67, Postal Letter Plate, (top).

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