US PATENT SUBCLASS 122 / 501
FLUID-DISPLACER

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

501FLUID-DISPLACER {1}
502  DF  .~> Fluid fuel

DEFINITION

Classification: 122/501

(under the class definition) Subject matter relating to boilers whose steam or water space or some part thereof contains fluid displacing elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

40, 242, 243, 406, and 509, for related art.