US PATENT SUBCLASS 165 / 66
.~.~.~ Heat exchange between supply and exhaust lines
Current as of:
June, 1999
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165 /
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HEAT EXCHANGE
58
DF
HEATING AND COOLING
{3}
61
DF
.~ Heating and cooling of the same material {4}
65
DF
.~.~ Heater and cooler serially arranged {1}
66
.~.~.~ Heat exchange between supply and exhaust lines
DEFINITION
Classification: 165/66
(under subclass 65) Apparatus wherein there is an exchange of heat between fluid flowing toward and fluid flowing away from a heat exchanger.
