Push button for an elevator

Details Push button for an elevator Push button for an elevator

1978-04-10

1980-07-01

Lucas, Susan J.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Elevator signal or call unit

D13 38, D1006, D1303

Patent

active

D02556677

REFERENCES:
patent: 2532228 (1950-11-01), Hesh
patent: 3699294 (1972-10-01), Sudduth
patent: 3899648 (1975-08-01), Murata

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