Hu Guohua's introduction

After the implementation of the patent law, all countries in the world have applied for the No.1 patent, and all of them have distinct characteristics of the times. During World War I, the first invention patent applied by the United States was a shotgun. Japan implemented the patent law after World War II, and the first patent application was a beautiful urn. After the reform and opening up, China's first invention patent was an optical device, and its design inventor was Hu Guohua, a native of East China.