US PATENT SUBCLASS 261 / 138
.~ Diverse heat supply or removal means

Current as of: June, 1999
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261 /   HD   GAS AND LIQUID CONTACT APPARATUS

127  DF  WITH EXTERNAL SUPPLY OR REMOVAL OF HEAT {14}
138.~ Diverse heat supply or removal means {1}
139  DF  .~.~> Electric heater

DEFINITION

Classification: 261/138

(under subclass 127) Apparatus wherein provision is made for at least two different kinds of heat transferences.