US PATENT SUBCLASS 122 / 311
.~.~ Cross

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

235.11  DF  WATER TUBE {52}
305  DF  .~ Spur {8}
311.~.~ Cross

DEFINITION

Classification: 122/311

(under subclass 305) Devices in which the spur tubes cross each other.

SEE OR SEARCH THIS CLASS, SUBCLASS:

278, for cross looped tubes.