Escalator switch panel

Details Escalator switch panel Escalator switch panel

1993-01-15

1994-07-12

Burke, Wallace R.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Elevator signal or call unit

Patent

active

D03486230

REFERENCES:
patent: D186890 (1959-12-01), Brounn
patent: D283687 (1986-05-01), Walser
patent: D317136 (1991-05-01), Kulikowski et al.
patent: D318632 (1991-07-01), Polacek et al.

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