Hall indicator panel for elevators

Details Hall indicator panel for elevators Hall indicator panel for elevators

1984-12-03

1986-05-06

Bullock, B. J.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Elevator signal or call unit

Patent

active

D02836866

REFERENCES:
patent: D214705 (1969-07-01), Brounn
patent: D254484 (1980-03-01), Perjo
patent: 3973648 (1976-08-01), Hummert et al.
Sweet's Arch. Catalog File, 1978, Sec. 14.1/Nov., p. 13, Signal Fixture with two Arrows, #1.
Sweet's Arch. Catalog File, 1978, 14.1/Oct., p. 15, Signal Fixtures 2-5 shown at middle portion on lower page.

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