US PATENT SUBCLASS 122 / 203
.~.~.~ Downdraft

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

*  DD  HORIZONTAL CYLINDER {6}
195  DF  .~ Water tube {7}
*  DD  .~.~ Water grate {5}
203.~.~.~ Downdraft

DEFINITION

Classification: 122/203

(under subclass 195) Devices having a down-draft water grate located beneath the boiler.