US PATENT SUBCLASS 165 / DIG 155
.~.~.~.~ Tubing has radially or axially extending sections


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

DIG 135  DD  MOVABLE HEAT EXCHANGER {4}
DIG 139  DD  .~ Fully rotatable {5}
DIG 152  DD  .~.~ Rotating agitator {2}
DIG 154  DD  .~.~.~ Hollow tubing rotates in vessel to stir contents {1}
DIG 155.~.~.~.~ Tubing has radially or axially extending sections