The Wright brothers’ critical insight was the importance of “lateral stability” — that is, wingtip-to-wingtip stability — to flight. And their great innovation was something they called “wing warping,” in which they used a series of pulleys that caused the wingtips on one side of the airplane to go up when the wingtips on the other side were pulled down. That allowed the Wrights’ airplane to make banked turns and to correct itself when it flew into a gust of wind.
But when the Wrights applied for a patent, they didn’t seek one that just covered wing warping; their patent covered any means to achieve lateral stability. There is no question what the Wrights sought: nothing less than a monopoly on the airplane business — every airplane ever manufactured, they believed, owed them a royalty. As Wilbur Wright, who was both the more domineering and the more inventive of the two brothers, put it in a letter: “It is our view that morally the world owes its almost universal system of lateral control entirely to us. It is also our opinion that legally it owes it to us.”
What was Curtiss doing in the meantime? In addition to coming up with the idea of adding wheels for easier takeoffs and landings, he invented an entirely different system for dealing with lateral stability, a system of flaps that went up and down and controlled the wings. (Airplane manufacturers today still use that basic insight.) The Wrights responded by filing a lawsuit, claiming that Curtiss was violating their patents. The litigation would consume them literally until the day Wilbur Wright died.
The problem with the Intellectual Property is that it incentivizes people to sit on their laurels once they’ve captured an idea, so stiffles the next round of innovation. Most of these ideas aren’t nearly as revolutionary as you think, as even ground break ideas are typically simultaneously invented by independent groups. There is a great survey of this across multiple major inventions in human history in Steven Johnson’s Where Good Ideas Come From.