US PATENT SUBCLASS 122 / 499
.~ Mouths

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

497  DF  FRONTS {2}
499.~ Mouths {1}
500  DF  .~.~> Water firebox

DEFINITION

Classification: 122/499

(under subclass 497) Subject matter relating to the same structure of the fuel feed opening of a firebox having water heating chambers or conduits. The feed water may be heated in this structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

93, 94, 189, 190, 193, and 194, for related art.