Well .. they applied for a patent on the Argus and here is a little info on that event ...
"Is your invention completely finished? Does it do what is supposed to do?Do you have a working prototype? Have you tested your invention? You must finish your invention before you can - patent your idea - because your patent must be based on what your invention is and modifications after the fact require another patent. Also, with a finished invention in hand you can do a market evaluation." http://inventors.about.com/od/firststeps/a/patent_an_idea.htm