US PATENT SUBCLASS 340 / 815.72
.~.~ Having pneumatic type indication

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

815.4  DF  VISUAL INDICATION {18}
815.69  DF  .~ Diverse indications {2}
815.72.~.~ Having pneumatic type indication

DEFINITION

Classification: 340/815.72

Having pneumatic type indication:

(under subclass 815.69) Subject matter in which one of the indications is an audible sound produced by the flow of air or other gaseous substances.

SEE OR SEARCH THIS CLASS, SUBCLASS:

404.1, for pneumatic type sound producer (e.g., whistle or siren).