US PATENT SUBCLASS 122 / 457
.~.~.~ Heater

Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

451 R  DF  FEEDERS {4}
*  DD  .~ Gravity {2}
456  DF  .~.~ Automatic {1}
457.~.~.~ Heater

DEFINITION

Classification: 122/457

(under subclass 456) Devices having means for heating the feed water.

SEE OR SEARCH THIS CLASS, SUBCLASS:

458, for hand operated gravity feeders with a heater.