2. Enterprises are more commercialized than universities, and often directly involve actual products. The relationship between products and patents is closer than that between research and patents. Actually developed products can often apply for patents, but research results can't. Some research results often belong to the nature of discovery, and the discovered natural laws do not belong to the object of patent protection. The result of using the laws of nature for invention and creation is. But it doesn't mean that universities don't engage in products, but also cooperate with enterprises. One more thing, in the past, universities paid more attention to publishing papers. Publishing these things is equivalent to gaining some fame. Since most colleges and universities do not produce their own products, they naturally do not need to compete in the product market, so there is no need to use patents to restrict others. Of course, universities can also make patents to restrict others and make money through licensing, but it seems that the goal of universities is not to make money.