https://blog.wongcw.com/2019/09/14/end-software-patents-%e5%8f%8d%e5%b0%8d%e8%bb%9f%e4%bb%b6%e5%b0%88%e5%88%a9%ef%bc%8c%e4%bd%a0%e8%a6%ba%e5%be%97%e6%80%8e%e9%ba%bc%e6%a8%a3%ef%bc%9f/