US PATENT SUBCLASS 122 / 233
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Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

*  DD  TANK {2}
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DEFINITION

Classification: 122/233

(under the class definition) Boilers consisting of a horizontally disposed closed chamber. Includes the combination of such a closed chamber with the furnace walls.

SEE OR SEARCH CLASS

220, Receptacles, appropriate subclasses for a closed tank or receptacle, whether used as a boiler or for other purposes.