Several older Apple products infringe upon a Samsung patent and cannot be sold within the United States.
Apple is banned from importing or selling older AT&T-compatible models of the iPhone and iPad, the International Trade Commission's held Tuesday.
Apple violated a Samsung patent related to cellular technology with AT&T models of the iPhone 3GS and 4, plus 3G models of the iPad 1 and 2, the ITC ruled in a two-page opinion attached below. The "determination is final, and the investigation is terminated."
Apple plans to file an appeal with the Federal Circuit, company spokeswoman Kristin Huguet told CNN.
Apple could also be spared by a veto from President Obama. The ITC is required by law to send its "exclusion orders" to the president for a 60-day review. That said, if President Obama doesn't strike down the order, it becomes final.
Apple and Samsung have been locking horns in courtrooms around the world as the two tech giants have accused one another of stealing patents and designs. In August 2012, Apple won a $1.05 billion verdict against Samsung.