US PATENT SUBCLASS 110 / 129
.~.~ Discharge valve

Current as of: June, 1999
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110 /   HD   FURNACES

119  DF  SPARK ARRESTERS {3}
122  DF  .~ Smokebox {7}
129.~.~ Discharge valve

DEFINITION

Classification: 110/129

(under subclass 122) Devices including discharge-valves for dumping the sparks from the smokebox.