US PATENT SUBCLASS 4 / 545
.~ With heating of tub structure

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

538  DF  TUBS {9}
545.~ With heating of tub structure

DEFINITION

Classification: 4/545

With heating of tub structure:

(under subclass 538) Subject matter which includes means for heating the tub directly or through a heat exchange which may contain a liquid or air as the heat exchange medium.

(1) Note. Immersion-type heaters, and the heating of the water in a separate tank are not regarded as heating tub structure.