US PATENT SUBCLASS 122 / 94.1
.~.~.~.~ Water tube type

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

44.1  DF  FIRE TUBE {11}
51  DF  .~ Horizontal {22}
90  DF  .~.~ Water firebox {8}
93  DF  .~.~.~ Offset {1}
94.1.~.~.~.~ Water tube type

DEFINITION

Classification: 122/94.1

Water tube type:

(under subclass 93) Devices composed of water tubes in whole or in part.