US PATENT SUBCLASS 122 / 378
.~.~ Updraft

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

371  DF  WATER GRATE {5}
*  DD  .~ Water firebox {2}
378.~.~ Updraft

DEFINITION

Classification: 122/378

(under subclass 371) Devices not otherwise provided for having a water firebox with an updraft water grate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

98, 229, 232, 289, 353, for other boilers with water grate structure.