US PATENT SUBCLASS 4 / 218
.~ Roof outlet
Current as of:
June, 1999
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4 /
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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.