US PATENT SUBCLASS 122 / 49
.~ Horizontal and vertical

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

44.1  DF  FIRE TUBE {11}
49.~ Horizontal and vertical

DEFINITION

Classification: 122/49

(under subclass 44) Fire tube boilers having both horizontal and vertical fire tubes.