US PATENT SUBCLASS 122 / 330
.~.~.~.~ Plural firebox

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

235.11  DF  WATER TUBE {52}
324  DF  .~ Straddle {2}
*  DD  .~.~ Single upper drum {1}
327  DF  .~.~.~ Plural lower drum {3}
330.~.~.~.~ Plural firebox

DEFINITION

Classification: 122/330

(under subclass 327) Devices having two or more fireboxes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

240, for miscellaneous water tube boilers having a plurality of fireboxes.