Robert Lynn wrote:

This was a patent maneuver. They needed to have the fact that they had a flight published in order to head off anyone else who tried to patent on the basis of prior art if it came to a legal wrangle (which it did).

I do not think so. Amos Root showed up out of the blue one day, driving an automobile, which marked him as a wealthy lover of high technology. The Wrights treated him cordially, as they treated all visitors. They went ahead with their flight tests. That was the first day they ever flew in a circle. Root described it in his magazine.

I do not think they needed to have a publication because they had affidavits from leading citizens such as the bank president, and copious other documentation, plus Wilbur had given a lecture and published two scientific papers in one of the top U.S. engineering journals, "Some aeronautical experiments," J. Western Soc. of Engineers 6, (1901) 489-510, and "Experiments and observations in soaring flight," J. Western Soc. of Engineers, (1903). They also published in "The Aeronautical Journal" in 1901, and various letters elsewhere. They had clear priority. The patent was issued in 1906.

As I recall, their patent lawyer was telling them to shut up, stop being so cordial with visitors and agents from the French and British governments, and stop flying next to a trolley line. Patent lawyers take the fun out of inventing.

Here is a good bibliography:

http://history.nasa.gov/monograph27.pdf

Here is the patent. Notice it has no engine. They were patenting flight controls, not the engine:

http://invention.psychology.msstate.edu/i/Wrights/WrightUSPatent/WrightPatent.html

- Jed

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