Canada first promulgated the drug patent law.

1869. The establishment and development of compulsory licensing system for early drug patents in Canada benefited from the demarcation point of 1992. 1992 In Canada, the compulsory licensing of pharmaceutical patents was less, mainly because the patent law at that time stipulated that the compulsory licensing of pharmaceutical patents could only be implemented in Canada. However, in 1969, Canada amended the patent law, added a clause allowing the import of patented drugs through compulsory license, and expanded the subject of application to anyone.