Electrical audio signal processing systems and devices – With amplifier
Reexamination Certificate
2002-12-19
2008-09-23
Chin, Vivian (Department: 2615)
Electrical audio signal processing systems and devices
With amplifier
C340S506000, C340S286020, C340S291000
Reexamination Certificate
active
07428311
ABSTRACT:
The present invention is an apparatus and a concomitant method for boosting the audio signal generated by at least one notification appliance in a supervised emergency voice evacuation system.
REFERENCES:
patent: 4375637 (1983-03-01), Desjardins
patent: 4881058 (1989-11-01), Berry, III
patent: 5887067 (1999-03-01), Costa et al.
Applegate Edward V.
Bizjak Brian E.
Curran John W.
Fetterly Richard H.
Kosich Joseph
Chin Vivian
Tran Con P
Wheelock Inc.
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