AT gearbox has patent barriers. Why are Japanese car companies not restricted?

Mainly due to the low cost, the main models of Japanese cars are about 654.38 million to 300,000. The displacement of this kind of vehicle is generally not very large, and the self-priming is generally below 2.0, and the turbocharging is below1.5t.. Therefore, the torque and horsepower are not very large, so cvt is a good choice in terms of comfort, fuel consumption and cost. If the power is above 2.0t, at gearbox is basically used, and dual clutch is rarely used.