US PATENT SUBCLASS 122 / 353
.~ Water grate

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

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

DEFINITION

Classification: 122/353

(under subclass 235) Devices with water grates that are not otherwise provided for.

SEE OR SEARCH THIS CLASS, SUBCLASS:

286, 287, 289, and 354, for other water tube boilers with water grates.