https://www.dpreview.com/forums/thread/4412857

I suppose the patent on the Leica Summicron is expired, so China is just doing what they do. But they also do it with patented items. I could care less what name they stamp on it. If they reverse engineer a Summicron, F-22 fighter, iPhone, or Rolex watch and then start making "clones", what is the ancient patent system of the west good for?

https://www.dpreview.com/forums/thread/4412857