US PATENT SUBCLASS 116 / 137 R
HORNS, WHISTLES AND COMPRESSIONAL WAVE GENERATORS

Current as of: June, 1999
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116 /   HD   SIGNALS AND INDICATORS

137 RHORNS, WHISTLES AND COMPRESSIONAL WAVE GENERATORS {6}
138  DF  .~> Motor exhaust or suction
139  DF  .~> Manually actuated air compressor
140  DF  .~> Variable tone
141  DF  .~> Chime
142 R  DF  .~> Diaphragm horns {2}
137 A  DF  .~> Supersonic wave generators

Unofficial Alpha Subclasses: R A

DEFINITION

Classification: 116/137

(under the class definition) Devices limited to structure of horns, whistles, and compressional wave generators and the means for their actuation, automatic means being excluded. This is the generic place for mechanical sonic and supersonic generators for wave transmission through media.

SEE OR SEARCH THIS CLASS, SUBCLASS:

24, for periodically operated horns and whistles.

SEE OR SEARCH CLASS

84, Music,

349+, for pipe organ pipes, subclasses 363+, for reed organ reeds, subclass 375, for minor reeds, subclass 380, for woodwinds, subclass 387, for brasses, and subclass 456, for tuning devices for pipes and reeds.

340, Communications: Electrical, 384.1+, for audible electric signals.

367, Communications, Electrical: Acoustic Wave Systems and Devices,

140+, for underwater and geophysical electric vibration transducers.

446, Amusement Devices: Toys,

202+, for a mouth-actuated whistle or siren.