As you are so hung up on the nationality thing and the answers seem stuck on a closed loop about personal attribution, perhaps you might explain the purpose of the question ?
The reason some countries are quoted as inventing and now persons are is all down to the enacting of patent law. A good explanation of how it changed for the USA is described thus -
"The first U.S. patent laws were enacted by Congress in 1790 as part of the Constitution. Before then, the King of England officially owned all the intellectual property created by the colonists. Prior to 1790, it was necessary for an inventor to make a special appeal to the governing body of the Colony or State to protect an invention. The first such patent on this continent was granted by the Massachusetts General Court to Samuel Winslow in 1641 for a novel method of making salt. George Washington signed the First United States Patent Grant on July 31, 1790, and the patent examiner was Thomas Jefferson. The first U.S. patent went to Samuel Hopkins of Pittsford, Vermont for a new method of making Potash, an industrial chemical used in making soap, glass, fertilizers and gunpowder. In 1790, the fee for a Patent was four dollars. "
So perhaps if we understood the thinking behind the question, we could better answer it.