Elevator pushbutton control panel

Details Elevator pushbutton control panel Elevator pushbutton control panel

1994-03-10

1996-01-02

Word, A. Hugo

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Elevator signal or call unit

Patent

active

D03657752

REFERENCES:
patent: D83458 (1931-02-01), Lighthipe
patent: D186890 (1959-12-01), Brounn
patent: D317138 (1991-05-01), Luckhardt et al.

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