Elevator hall traffic sensor housing

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Lost child or person locator

Patent

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Details

D26 72, D10108

Patent

active

D03253554

REFERENCES:
patent: D116170 (1939-08-01), Rittenhouse
patent: D158803 (1950-05-01), Russell
patent: D166034 (1952-02-01), Gray
patent: D217037 (1970-03-01), Weinstock
patent: D279871 (1985-07-01), Guscott et al.
patent: D313569 (1991-01-01), Allard et al.
patent: D314919 (1991-02-01), Villar

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