US PATENT SUBCLASS 181 / 203
.~.~.~ Reaction engine test chamber

Current as of: June, 1999
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181 /   HD   ACOUSTICS

175  DF  SOUND-MODIFYING MEANS {12}
198  DF  .~ Housing or enclosure (e.g., sound confining and absorbing) {2}
200  DF  .~.~ Machine type enclosure {5}
203.~.~.~ Reaction engine test chamber

DEFINITION

Classification: 181/203

Reaction engine test chamber:

(under subclass 200) Subject matter wherein a reaction-type engine is completely enclosed while undergoing a testing operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

217, and 218, for similar devices, but which do not enclose the acoustical device.

SEE OR SEARCH CLASS

60, Power Plants,

200.1+, for reaction engines of this subclass type, per se.