US PATENT SUBCLASS 449 / 12
.~ With heater

Current as of: June, 1999
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449 /   HD   BEE CULTURE

3  DF  HIVE {19}
12.~ With heater

DEFINITION

Classification: 449/12

With heater:

(under subclass 3) Structure combined with structure to raise the thermal level of the hive or of a portion thereof.