Dual vehicular siren-speaker housing

Details Dual vehicular siren-speaker housing Dual vehicular siren-speaker housing

1988-04-22

1990-11-13

Burke, Wallace R.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

Patent

active

D03120570

REFERENCES:
patent: D243834 (1977-03-01), Leeder
patent: D292498 (1988-10-01), Hayashi
patent: 3240289 (1966-03-01), Kishi
patent: 4436178 (1984-03-01), Gieger

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