施乐在复印机行业拥有500多项专利,假如一个企业要花钱买它的500多项专利,制造出来的复印机会比施乐贵几倍,根本没有市场。施乐用专利技术的办法来保护自己。美国这类产品的专利有效期为十年,到了第九年,佳能开始对施乐进行研究:从施乐产品有哪些不能满足人们需要的地方入手,如 Xerox has more than 500 patents in the copier industry. If a company spends more than 500 patents on its copy machines, it will produce several times more photocopiers than Xerox, and there is simply no market for it. Xerox uses patented technology to protect itself. The patents for such products in the United States are valid for ten years. By the ninth year, Canon began to study Xerox: starting from where Xerox products do not meet the needs of the people, such as