关于专利权默示许可制度的研究最早的案件可以追溯到英国的Betts诉Wilmott一案,关于该案件的相关研究对于认识默示许可证明责任的承担及默示许可制度产生的原因都有着重要作用。本文以该案为切入点,希望能够通过对本案的分析对专利默示许可争议证明责任问题从根源上进行分析,同时也希望对探析默示许可的产生默示研究有所得益。 The first studies on the system of implied licensing of patent rights can be traced back to the case of Betts v. Wilmott in the United Kingdom. Relevant studies on the case play an important role in understanding the burden of implied license and the reasons for the system of implied permission . This article takes the case as a starting point, hoping to analyze the origin of the issue of the liability for the implied license of the patent through the analysis of the case, and also hopefully the benefit of the implied study of the implied license.