licença compulsória

a licence (=official permission to do something) created by statute that allows certain parties to use either copyrighted material or a patented invention without the permission of the copyright or patent owner, in return for the payment of a royalty (=a payment to someone such as a writer or musician each time that something they have created is sold or used)

a situation where an individual or a company can use another's intellectual property without first getting the owner's permission. Compulsory licences are especially common in relation to pharmaceutical patents.