US PATENT SUBCLASS 236 / *
.~ Combined thermostat and flow controlled

Current as of: June, 1999
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236 /   HD   AUTOMATIC TEMPERATURE AND HUMIDITY REGULATION

20 R  DF  CLOSED FLUID HEATERS {8}
*.~ Combined thermostat and flow controlled {2}
23  DF  .~.~> One valve
24  DF  .~.~> Two or more valves