Open sourcing modelling tools and generators becomes more and more important as open source software as a whole becomes more important. We evaluate the impact open source licenses of code generators have on the intellectual property (IP) of generated artifacts comparing the most common open source licenses by categories found in literature. Restrictively licensed generators do have effects on the IP and therefore on the usability of the artifacts they produce. We then how how this effects can be shaped to the needs of the licensor and the licensee.