China's patent applications for NdFeB have increased rapidly. From the global patent distribution, the number of Japanese patent applications in NdFeB ranked first, about 3700, China ranked second, about 2500. The next is the United States, Europe, and so on. Up to now, the application of the rare earth permanent magnet patent has experienced two peaks: the first appeared in 1987, mainly in the Japanese patent application. During this period, the NdFeB technology made a breakthrough; the second time appeared in the 2013, mainly in China and Japan, and the patent is concentrated on the sintered NdFeB's component improvement and process improvement.
Since the research and production of NdFeB permanent magnets began in the early 1980s, great progress has been made in China after 30 years of development. The annual related applications of NdFeB patents in China have increased rapidly since the beginning of twenty-first Century. The global proportion of the total application has risen from 3.8% in 1985 to 73.9% in 2013 .Since the patent application needs a certain period of review to be open, and the normal open time of the patent application is 18 months from the application date. So the datacan only be traced back to the 2013 .
