"It seems to me that the US has been the leader in world technological development almost since it's earliest days when Franklinís lightning rod that was adopted all over the world. From then there was a steady stream of things invented here independent of what was happening elsewhere."
The U.S was prominent, but not the world leader in technological development until the early 1900s (after Europe was crippled by the war). Americans are pretty constantly subjected to pro-American propoganda, both official and cultural (cheerleading - all countries do that), which inflates the country's accomplishments.
For example, the airplane was being developed in parallel in many places, and the world could have recorded Brazilian Alberto Santos-Dumont as its inventor rather than the Wright Brothers, had the U.S view not dominated the events of history (Brazilians still believe that - as I said above, all countries do cheerleading, boosting their own accomplishments to themselves).
Alexander Graham Bell was a Scott, and invented the telephone in Ontario.
America's "greatest inventor", Thomas Edison, was actually less an inventor and more an industrialist. He did some research, hired people to do other research, and bought patents from others, and commercialised them. For example, Edison bought the patents to the light bulb he sold from Canadians Henry Woodward and Mathew Evans, and their work was based on Joseph Swan of England, who sold light bulbs before Edison.
Even the American Revolution was won by France as much as Americans, as the revolutionary forces were on their way to certain defeat until France got involved.
So remember that history is always viewed through prejudice, and may not be what it seems.