It’s very simple. The production process and formula of NdFeB are all Japanese patents. Although most of the patents expired a few years ago, there are still several key patents that are still valid in the United States.
If we do not purchase the patent authorization from Hitachi Metals, Zhongke Sanhuan’s magnets cannot be sold in patent areas. In order to occupy the market, we must purchase the patent. The same goes for other domestic NdFeB manufacturers.