Who invented the first road bicycle?

If that's a name, then I don't know.

If it's a description of what the bike actually did, then I don't know either.

But it is AMAZINGLY improbable that there was a flying bicycle in 1923, unless you count bikes being ridden at speed over jumps or possibly off cliffs.

It took somewhere into the 80s(look up "Gossamer Albatross") before aerodynamics and material sciences had progressed to the point where building a human-powered airplane, driven by bicycle-like pedalling had become possible.