Licensing would restrain trade
The principle is that no one is allowed to create a monopoly by licensing their intellectual property. The Sherman Act and the Clayton Act are the foundations of law governing restraint of trade in the United States, and they form the basis of many related foreign laws as well.
The Sherman Act declares that any contract that restrains trade is illegal, including monopolizing or attempting to monopolize any trade or commerce.
The Clayton Act forbids price discrimination, forcing customers to refrain from buying from competitors, acquiring another company to lessen competition and other unfair or deceptive acts.
In addition, misuse of intellectual property is forbidden. Fraudulently obtained patents cannot be enforced and licensed. If the license of a patent is conditioned on paying royalties covering non-patented technology, patent misuse may be claimed.
In European Union, Article 101(1) of EU Treaty prohibits all agreements between undertakings, decisions by association of undertakings, or concerted practices which may affect trade between Member States and which have as their object of effect, the prevention, restriction or distortion of competition with the common market.
Article 102 provides that any abuse by one or more undertakings of a dominant position within the common market or in a substantial part of it shall be prohibited as incompatible with the common market. It prohibits unfair pricing or selling conditions, refusals to license, discrimination, and bundling or typing.
We must avoid all these forbidden practices when developing license agreement terms. Otherwise the agreement can be terminated and, in some cases, the intellectual property protection can be voided.

