US PATENT SUBCLASS 122 / 202
.~.~ Trapped circuit

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

*  DD  HORIZONTAL CYLINDER {6}
195  DF  .~ Water tube {7}
202.~.~ Trapped circuit

DEFINITION

Classification: 122/202

(under subclass 195) Devices having a water tube heating circuit provided with some form of sediment trap in the circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

91, 398 and 404, for analogous art.