US PATENT SUBCLASS 236 / *
.~ Thermostatic

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

20 R  DF  CLOSED FLUID HEATERS {8}
*.~ Thermostatic {2}
32  DF  .~.~> Expanding fluid
33  DF  .~.~> Expanding solid