The 21st century has witnessed an explosion of state and private actors in space with enormous possibilities for discovery and innovation. While on Earth, there are substantial systems of safeguarding intellectual property (IP), most IP systems are territorial, thus their applicability in outer space is a delicate subject. On a second, the emergence of greater international cooperation on missions also increases issues of joint ownership, and the joint launch, operation and maintenance of space assets between two or more states. This paper addresses the existing content of space law and its implications as it affects the protection of inventions made in space. It examines the unresolved issues of invention and data ownership in joint ventures such as the International Space Station, the Artemis Accords framework, and other international programs. It examines instruments such as the Outer Space Treaty (1967), the Liability Convention (1972), and the ISS Intergovernmental Agreement to determine their weaknesses when it comes to dealing with IP issues. The paper concludes that the existing regime is insufficient to deal with inventions made in space and suggests that existing treaties should be amended to specifically include space-made inventions.