A Checklist of issues that a patent owner's counsel should consider before commencing a patent infringement investigation at the US International Trade Commission (ITC) under Section 337 of the Tariff Act (19 U.S.C. § 1337). It addresses determining whether the ITC is an appropriate forum, selecting the asserted patents, evaluating the merits of potential claims and defenses, identifying the proper parties, preparing the complaint, and preparing for discovery.