The US Justice Department announced today that it will close its investigation into Samsungs use of patents to attack rivals like Apple. This decision comes after Samsung filed a patent infringement complaint against Apple at the US International Trade Commission and won an order in June 2013 to ban the sale of some iPhone and iPad models in the US. The ban was vetoed by President Obama last August, and now the Justice Department is stating that it sees no reason for the investigation to continue. The Department of Justice has been investigating Samsungs use — and potential misuse — of standards-essential patents (SEPs) for years now.