US PATENT SUBCLASS 122 / *
.~.~ Water grate

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

235.11  DF  WATER TUBE {52}
*  DD  .~ Over bridge wall {3}
*.~.~ Water grate {2}
286  DF  .~.~.~> Downdraft
287  DF  .~.~.~> Intermediate draft