US PATENT SUBCLASS 454 / 32
.~.~ T-top

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}
32.~.~ T-top

DEFINITION

Classification: 454/32

T-top:

(under subclass 3) Subject matter wherein the structure comprises two arms which, with the vertical conduit section, form a T-shape.