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


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

*  DD  HORIZONTAL CYLINDER {6}
195  DF  .~ Water tube {7}
*.~.~ Water grate {5}
203  DF  .~.~.~> Downdraft
204  DF  .~.~.~> Intermediate draft
205  DF  .~.~.~> Multiple series
206  DF  .~.~.~> Solid and water bar
207  DF  .~.~.~> Updraft