How much did you sell for the patent of universal charging?

About 20 million yuan. In 2003, Chen Tian Han came out with his invention universal charger. In the era of 200 million mobile phone users at that time, his patent earned him about 20 million. It was once popular in China market, but after 20 1 1 year, it began to collect interface models in a unified way, and the universal punch gradually declined.