US PATENT SUBCLASS 454 / 906
NOISE INHIBITING MEANS
Current as of: June, 1999
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DEFINITION
Classification: 454/906
NOISE INHIBITING MEANS:
(under the class definition) Subject matter comprising means which prevents or deadens unwanted sound.
(1) Note. For the line between Class 454 and other classes, see the Search Notes below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
206, for a window mounted air pump including specific noise inhibiting structure.
262, for an inlet airway, including structure for mixing plural airstreams together, which has specific noise inhibiting structure.
346, for an outlet airway having vibration absorbing or preventing structure.
SEE OR SEARCH CLASS 181, Acoustics, appropriate subclasses. Note particularly
212+, for a fluid-conducting-type sound muffler of a general nature, and see the (1) Note to subclass 212 for lines with this class (454); and subclass 224 for a sound absorbing ventilating duct.
