US PATENT SUBCLASS 454 / 10
.~.~ Inlet

Current as of: June, 1999
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454 /   HD   VENTILATION

1  DF  CHIMNEY OR STACK {6}
3  DF  .~ Chimneytop or stacktop structure (e.g., cowl) {12}
10.~.~ Inlet {1}
11  DF  .~.~.~> Having air current responsive adjustment means (e.g., wind vane, etc.)

DEFINITION

Classification: 454/10

Inlet:

(under subclass 3) Subject matter comprising a passage for directing air to the ventilated space.

SEE OR SEARCH THIS CLASS, SUBCLASS:

107, for railcars, buses, or trailers having inlet airways.

143+, for other vehicles having inlet airways.

254+, for static structures (e.g., buildings) having inlet airways.