It wouldn't be appropriate to say "they were responsible for 100% of the technological development and research that led to this machine" but if that's what "invented" means then nobody has ever invented anything.
An airplane without good aircraft controls could start to fly without problems, but it would normally crash sooner or later, either due to flight instabilities or because it had to eventually land somewhere.
You come and adjust them. Did you just invent the bike? Or did you build upon my previous invention(s) and perfected it, making us both partial inventors?
People invent things. But "airplane" turned out to be much more than one thing. Not all of them were invented by Curtiss (a local favorite), or by Santos-Dumont, or by Lilienthal, Caproni, the Wrights, or whoever.