Has there been any successful patent infringement lawsuits over the last three years that targets a Chinese company that has infringed upon a US company? Isn't that part of the issue in the current trade deal talks with China?
Not a US company being infringed, but Lego has gotten a Chinese court to order Lepin to stop making imitations of Lego products. [1] Since arrests have been made over Lepin not complying [2], it seems like the ruling has teeth.
Several years ago Scottish chip company FTDI took matters into their own hands by releasing a driver that would brick counterfeits of their USB to serial converter chip: https://en.wikipedia.org/wiki/FTDI#Driver_controversy