US PATENT SUBCLASS 60 / 725
.~.~ Having noise reduction means

Current as of: June, 1999
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60 /   HD   POWER PLANTS

39.01  DF  COMBUSTION PRODUCTS USED AS MOTIVE FLUID {31}
722  DF  .~ Combustion products generator {14}
725.~.~ Having noise reduction means

DEFINITION

Classification: 60/725

Having noise reduction means:

(under subclass 722) Device having means to reduce or suppress acoustic propagations from or within the combustion device.

(1) Note. Included herein are means to suppress resonance of gases within the combustion device.

SEE OR SEARCH CLASS

181, Acoustics, appropriate subclass for acoustic treatment means.

431, Combustion,

114, for combustion devices of general utility having sound or pulsation attenuating means.