"Flow Hive" device was previously invented and patented in 1939 by Juan Bizarro (spanish), USA / Spain office;  patent (nº US2223561A) 

You can see plans and patent following this link http://www.freepatentsonline.com/2223561.pdf


P. David Quesada
Department of Honey Bee Pathology
Goverment of Extremadura
Spain

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