US PATENT SUBCLASS 122 / 129
.~.~.~ Downdraft

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

44.1  DF  FIRE TUBE {11}
114  DF  .~ Vertical {13}
*  DD  .~.~ Water grate {1}
129.~.~.~ Downdraft

DEFINITION

Classification: 122/129

(under subclass 114) Devices having a downdraft water grate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

371, for miscellaneous boilers with water grates.