US PATENT SUBCLASS 122 / 354
.~.~ Downdraft

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

235.11  DF  WATER TUBE {52}
353  DF  .~ Water grate {1}
354.~.~ Downdraft

DEFINITION

Classification: 122/354

(under subclass 353) Devices having downdraft water grates.