US PATENT SUBCLASS 449 / 13
.~ With ventilator

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

3  DF  HIVE {19}
13.~ With ventilator {1}
14  DF  .~.~> In cover

DEFINITION

Classification: 449/13

With ventilator:

(under subclass 3) Structure with or including provision to encourage the flow of air through the hive.