US PATENT SUBCLASS 122 / 235.29
.~ Having forced circulation system

Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

235.11  DF  WATER TUBE {52}
235.29.~ Having forced circulation system

DEFINITION

Classification: 122/235.29

Having forced circulation system:

(under subclass 235.11) Devices wherein a means other than convection is used to move a fluid through the tube.