US PATENT SUBCLASS 165 / 9.4
.~.~ In casing

Current as of: June, 1999
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165 /   HD   HEAT EXCHANGE

4  DF  REGENERATOR {4}
9.1  DF  .~ Checker brick structure {3}
9.4.~.~ In casing

DEFINITION

Classification: 165/9.4

(under subclass 9.1) Apparatus in which the modular units are arranged in a gas confining shell.