What happened to the bamboo patent of Menjia who was taught?

Dedicated to China Academy of Sciences. In the TV series "Come Home with Me", after Meng developed the electric drill technology, he did not sell the core technology of the electric drill abroad. On the contrary, in order to protect China's intellectual property rights and technological advantages, he negotiated hard with foreign companies and finally won, which was a victory for China enterprises to protect their intellectual property rights, and also a manifestation of China's self-confidence.