I want to know the answer to the following question:
Who started making an unlicensed version of the 40mm at the beginning of the war?
All the background I'm provided with is that "The Imperial measurement production drawings the British had developed were supplied to the Americans who produced their own (unlicensed) copy of the 40 mm at the start of the war, moving to licensed production in mid-1941.". Is that enough to answer the question?
Answer: yes