I'm pretty sure he was killed so that no one would ever find that out.
Then he didn't have a patent. Patents are public and if he had one in 1998, it would now be available for anyone to use and produce from.
Invention Secrecy Act
The Invention Secrecy Act of 1951 is a body of United States federal law designed to prevent disclosure of new inventions and technologies that, in the opinion of selected federal agencies, present a possible threat to the national security of the United States. Government Secrecy Orders on Patents Have Stifled More Than 5,000 Inventions. I don't know for sure, but this is what might have happened to a possible patent.
I do not like your facts. Therefore I am labeling you a racist nazi bigot.
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