US PATENT SUBCLASS 165 / DIG 33
.~.~.~ With flow control device (i.e. valve)


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

DIG 9  DD  HAVING A SOLID HEAT STORAGE MASS FOR ABSORBING HEAT FROM ONE FLUID AND RELEASING IT TO ANOTHER (I.E. REGENERATOR) {5}
DIG 30  DD  .~ Mass formed of modules arranged in three dimensional matrix ("Checkerwork") {4}
DIG 32  DD  .~.~ Having gas supply or exhaust manifold structure {2}
DIG 33.~.~.~ With flow control device (i.e. valve)