Ownership of patent rights often is overlooked. The lack of an unbroken chain of title from the true inventors to the current owner can devalue, or completely impair, a US patent. Unfortunately, ownership issues usually do not arise until financing or a licensing agreement is sought and third party review of a US patent uncovers a deficiency, putting cloud over its title. In an extreme case, lack of complete title to a patent can be the deciding factor in infringement litigation. Court decisions in 2015 highlighted some of the pitfalls and lessons surrounding patent ownership.