US PATENT SUBCLASS 237 / 62
.~.~ Boiler loop

Current as of: June, 1999
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237 /   HD   HEATING SYSTEMS

56  DF  WATER {5}
59  DF  .~ Circulation {4}
62.~.~ Boiler loop

DEFINITION

Classification: 237/62

(under subclass 59) Subject matter in which only a part of the water is bypassed through a boiler.