Patent assignments are tools for transferring ownership rights in patents, patent applications, and inventions from inventors to their employers, sponsors, or other “assignees.” In Rubin v. United Therapeutics Corp., No. 1593, 2019 WL 290272 (Md. Ct. Spec. App. Jan. 4, 2019), an inventor, Dr. Rubin, filed a complaint seeking to have assignments he executed in favor of United Therapeutics Corp. (UTC) set aside on the grounds of constructive fraud, negligent misrepresentation, reformation of contract/mutual mistake, and breach of contract. Dr.