A great example of this is the Wright Brother's First Flight. Most are aware that the Wright Brothers are famous for being the first at powered controlled flight. What many are not aware of is just how many other inventors across the world were "racing" each other to be the first...and how many had made attempts just before the Wright Brothers succeeded with their's. Once the Wright Brothers succeeded, it was many others that had in fact improved upon what the wright Brothers had done...very soon after. What is missed through all of this, is probably the most important invention to powered flight that the Wright Brothers contributed...the variable pitch propeller. It was that propeller that separated the Wright Brothers from the others in that race, and it was that same propeller, and the lack of a patent on it (ohhh Wilber) that allowed the others catch up so fast.
History is a funny thing. It's what we find below the surface that is probably the most interesting and influential to future Historical events.
Race to the Sky: The Wright Brothers Versus the United States Government