One of the most copied guns designed is the CZ75. Why is that?
From what I read one time the history of CZ (including the Nazi take over in WWII) in a mag, CZ (1975=75) was under the rule of the iron curtain. They didn't want to patented it because they were being so secretive. Well, that didn't work very well, did it?
It just took one, Pandora's box was opened.