Plans on the drawing boards don't count as inventing anything.
The F-111 was the first plane to have the swing wing design and the F-14 shortly after.
The luft46 site is excellent for interpreting how the planes would have looked if they had been produced.
Check out the Sanger Amerika project, the first concept of a sub orbital intercontinental bomber.
xmb.abovetopsecret.com...

