US PATENT SUBCLASS 122 / 322
.~.~ Fluid fuel

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

235.11  DF  WATER TUBE {52}
321  DF  .~ Standpipe {2}
322.~.~ Fluid fuel

DEFINITION

Classification: 122/322

(under subclass 321) Devices heated by fluid fuel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

216, for sectional stand pipe boilers heated by fluid fuel.

245, for coiled or looped tube boilers with a stand pipe and heated by fluid fuel.

308, for stand pipes provided with spur water tubes and heated by fluid fuel.