I see your point. Your post made me realize that the way I stated the question wasn't exactly what I meant to ask. Since all modern velocipede are traced back to those early human-power invention so the question of what's invented first is incorrect. From what I understand the pivotal turning point seems to be the banning of recumbent from bicycle racing in 1934.

What I should ask was: if recumbent or trike were the popular bikes and that's what you rode as a kid, would you ride the DF today?