What goes round...
Many years ago it was alleged that Nikon cloned the Leica camera and then used it as a base to develop the SLR camera, at which point Leitz stole it back.
I recall a case where a Japanese company - forget which - cloned an IBM chip, including a mistake which was "fenced off" from the rest of the circuit. Apparently they could not figure out how it worked so they just copied the lot.
Those were the "wild west" days. Today they use lawyers. Is it just me or was it more fun in those days? (For the bystanders anyway) :-)