My grandfather had 2 patents in the 40's. One for a ventilated roof, the other for a bottom board. Both are obviously expired. We still use the bottomboard design, it is reverseable. Every few years you flip it over, and the bottom side gets clean by it's self.
A forum community dedicated to beekeeping, bee owners and enthusiasts. Come join the discussion about breeding, honey production, health, behavior, hives, housing, adopting, care, classifieds, and more!