With the advancement of technologies and the competition in technology field, entrepreneurs are motivated to invent new innovations, to which intellectual property rights are attached. As the most obvious example, the inventors of electronic devices, such as smartphone, always file for a patent to protect their rights. Since these entail various disputes regarding the patent infringement or the patent validity, the United States court has published A Guide to Patent Litigation in Federal Courté to facilitate the parties to the patent litigation. Where parties disagree with the federal courtûs judgment, the case can be appealed to the United States Court of Appeals for the Federal Circuit, and the Supreme Court, respectively. There is a use of Writ of Certiorari, the order of the Supreme Court to the lower court, which consists of terminologies and phrases in the legal context, including the patent terminologies, and the Latin terms. The study of patent case litigation in the United States introduces us to the litigation system in the United States, together with the relating operable legal and phrases.