Measuring – testing – or signalling instruments – Security or signal instrument or casing – Elevator signal or call unit
Patent
1989-05-12
1991-05-28
Burke, Wallace R.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Elevator signal or call unit
Patent
active
D03171370
REFERENCES:
patent: D67376 (1925-05-01), Van Bloem
patent: D254484 (1980-03-01), Peijo
patent: D255105 (1980-05-01), Peijo
The Honeywell Pamphlet, 2-12-75, p. 3, item--Elevators Graphic Display.
Kulikowski John M.
Polacek Richard R.
Weirsman William
Burke Wallace R.
Jackson Marcus
Jones William W.
Otis Elevator Company
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