US PATENT SUBCLASS 122 / 356
.~.~ Fluid fuel

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

235.11  DF  WATER TUBE {52}
355  DF  .~ Zigzag {3}
356.~.~ Fluid fuel

DEFINITION

Classification: 122/356

(under subclass 355) Devices heated by fluid fuel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

208, for plate boilers with zigzag conduits.

250, for vertical coil water tube boilers heated by fluid fuel.