US PATENT SUBCLASS 236 / *
.~ Exhaust operated

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

36  DF  HEATING RADIATOR {4}
*.~ Exhaust operated {2}
*  DD  .~.~> Fluid-operated motor {1}
40  DF  .~.~> Thermostatic {1}