US PATENT SUBCLASS 178 / 100
.~.~ Augmenting

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

118  DF  RECEIVERS {4}
98  DF  .~ Sounders {2}
100.~.~ Augmenting

DEFINITION

Classification: 178/100

(under subclass 98) Sounders having means--such as box sounders, resonators, sounding boards, etc.--for intensifying the audible signals.

SEE OR SEARCH CLASS

181, Acoustics,

177+, for sound intensifying horn.