US PATENT SUBCLASS 122 / 333
.~.~ Fluid fuel

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

235.11  DF  WATER TUBE {52}
332  DF  .~ Vertical {10}
333.~.~ Fluid fuel

DEFINITION

Classification: 122/333

(under subclass 332) Devices heated by fluid fuel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

167, 174, 250, 283, 319, and 348, for other boilers heated by fluid fuel.