US PATENT SUBCLASS 122 / 437
.~ Safety valve

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

412  DF  FEED HEATERS {17}
437.~ Safety valve

DEFINITION

Classification: 122/437

(under subclass 412) Subject matter comprising a conduit leading from a boiler safety valve to a water receptacle for heating the water when the steam escapes from the safety valve.