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Communications
Class Information
Number:
181/181
Name:
Acoustics
>
Sound-modifying means
>
Intensifying horn
> With vibratory filaments
Description:
Subject matter including thin wires which are attached to the sound intensifying horn.
Patents under this class:
Patent Number
Title Of Patent
Date Issued
5302310
Detergent compositions containing a carbonate builder, a seed crystal and an immobilized sequestrant
Apr. 12, 1994
5170436
Acoustic speaker system
Dec. 8, 1992
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