What are the reasons for buying a patent and what are its advantages?

Patent purchase is the most direct way to increase patent reserves in the short term. According to statistics, Japanese companies purchased a large number of American patents in the 1970s and 1980s, and mastered a number of core patented technologies through these purchases, forming a preliminary patent development foundation. Korean companies also obtained many American patents in the 1990s. For example, in 1997, when AST, an American company that once ranked third in the world in personal computer sales, was acquired by Samsung of South Korea, it brought a lot of valuable patents to Samsung. After LG bought the patents of Wang An Computer Company in the United States, it also changed from a production enterprise to a real high-tech company with many core patents.