In class we have discussed the USPTO, but the USITC is equally important. The USITC or United States International Trade Commission, is US-based agency that is supposed to help protect US domestic industry from foreign competition. This includes, and why I chose to write about it, the unauthorized importation of patented goods.
In addition, someone who has a patent can allege patent infringement at the USITC or Federal Court and that there are no restrictions from doing both at once. Since the case of eBay v. MercExchange, about 20% of the investigations with companies who have licensed patents don't use the invention, which is well below the numbers seen in federal district courts. This doesn't stop the fact that the investigations have been on the rise peaking in 2011. Companies that license patents typically make that money when the patented technology is used by other people and royalties come into effect.