US PATENT SUBCLASS 4 / 681
.~.~ And trap

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

679  DF  DRAIN, OVERFLOW OR TRAP FOR A SINK OR BATH {3}
680  DF  .~ Drain and overflow {2}
681.~.~ And trap

DEFINITION

Classification: 4/681

And trap:

(under subclass 680) Subject matter wherein the apparatus includes means to prevent sewer gas from flowing into the sink or bath.