Unlike trump, China is pretty I think you mean trademark in this case. Trademark just brand logo really. Patent is different from trademarks, copyright. Patent is different for every country, if I want a patent in America, I have to apply for america, and I have America patent I still have to apply for China. And patent cost money per year. SD card are farely new tech, it still have patents. No way WTO will allow China if no patent have been paid. Alots of companies use industrial secretive instead of patent, then they are free to reverse engineer. And some companies that dose not do business in China, may apply patent to EU or US and not in China. Hence business in china are free to copy. Another example, Phanteks apply for a swappable fan mount in china, althouht stupid other brands in China like lianli can't use them. But they can in America or Europe. No one will pay for patent protection fees in China if they allow companies to copy freely. How I wish patent if free in China, thunderbolt docks whould be everywhere. And iPhone lightning Otg cable wouldn't 2 US dollars more than type c. Some times it's common dose not means it doesn't have patents, like Bluetooth. All devices use Bluetooth have to pay for patents.