Alarm signal cover

Details Alarm signal cover Alarm signal cover

1988-03-30

1991-03-05

Burke, Wallace R.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Lost child or person locator

Patent

active

D03151123

REFERENCES:
patent: D271984 (1983-12-01), Nelson et al.
patent: D277299 (1985-01-01), Nelson
patent: D305881 (1990-02-01), Bergeron
Edwards specification sheet for the 1212B Series Fire Alarm Systems, undated.
Wheelock specification sheets for the ET 100 Series Speakers dated Oct. 1983.
Wheelock specification sheets for the TBM-101 Series Talk-Back Module dated Sep. 1986.

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