US PATENT SUBCLASS 4 / 218
.~ Roof outlet


Current as of: June, 1999
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4 /   HD   BATHS, CLOSETS, SINKS, AND SPITTOONS

209 R  DF  VENTILATION {10}
218.~ Roof outlet


DEFINITION

Classification: 4/218

The structure of the roof connection with the vent pipe.

SEE OR SEARCH CLASS

285, Pipe Joints or Couplings,

42+, for roof flashing.

454, Ventilation, for ventilating devices not peculiar to subject matter of this class, particularly

1+, 115+, 162+, and 341+ for exhaust-type ventilating devices, in general, which are associated with roof structure.