US PATENT SUBCLASS 110 / 172
FRONTS

Current as of: June, 1999
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110 /   HD   FURNACES

172FRONTS

DEFINITION

Classification: 110/172

(under the class definition) Constructions for furnace-fronts, including door structures in furnace-fronts.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers,

497+, for boiler fronts.