Combined electronic siren and handheld microphone

Details Combined electronic siren and handheld microphone Combined electronic siren and handheld microphone

1995-02-17

1996-02-27

Word, A. Hugo

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

D14225

Patent

active

D03674355

REFERENCES:
patent: D253767 (1979-12-01), Peterson
patent: D258879 (1981-04-01), Eaton et al.
patent: D323403 (1992-01-01), Sinrod
patent: D331719 (1992-12-01), Ackerman et al.
patent: 4633232 (1986-12-01), Nelson et al.

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