Patent No. 5571247
Self Containing Enclosure for Protection from Killer Bees
A self contained protective enclosure with an opening for entry and egress and a screen for ventilation and viewing.
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Class 524 is a continuation of Class 523. Class 523, subclass
1 is the parent subclass of all the Class 524 subclasses.
The Class 523 Class Definition is applicable to both Class
523 and Class 524.