Audible alarm for doors and windows

Details Audible alarm for doors and windows Audible alarm for doors and windows

1992-12-17

1994-02-01

Burke, Wallace R.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Alarm or control thereof

Patent

active

D03438040

REFERENCES:
patent: D272237 (1984-01-01), Preciado
patent: D328440 (1992-08-01), Harper
patent: 2904223 (1959-09-01), Ryan
patent: 4018361 (1977-04-01), Fegley
patent: 4050402 (1977-09-01), Merriman
patent: 4553134 (1985-11-01), Holt
patent: 4721946 (1988-01-01), Zunkel
patent: 4722461 (1988-02-01), Symmank

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