US PATENT SUBCLASS 122 / 199
.~.~.~ Firebox

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

*  DD  HORIZONTAL CYLINDER {6}
195  DF  .~ Water tube {7}
198  DF  .~.~ Lateral-vertical {1}
199.~.~.~ Firebox

DEFINITION

Classification: 122/199

(under subclass 198) Devices in which the tubes are on each side of the firebox.

SEE OR SEARCH THIS CLASS, SUBCLASS:

68, and 94, for analogous art.