US PATENT SUBCLASS 4 / 322
.~.~ And heater

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

300  DF  FLUSH CLOSET {22}
321  DF  .~ With holding tank {2}
322.~.~ And heater

DEFINITION

Classification: 4/322

And heater:

(under subclass 321) Subject matter including means for introducing heat to the tank for the purpose of warning, preventing freezing and/or sterilizing the contents of the tank.