On Tuesday, the International Trade Commission ruled in favor of Samsung on claims that Apple violated one of its patents. The ITC granted Samsung injunctive relief, effectively banning Apple from importing or selling a number of its products, of note the iPhone 4 and the iPad 3. President Obama can overturn the ITC ruling within 60 days, allowing Apple to continue selling its products, but it’s doubtful that will occur. Very rarely do presidents exercise this power. In the meantime, Apple can appeal the decision in the U.S. Court of Appeals for the Federal Circuit. And Apple and Samsung are still fighting their patent dispute in federal court in California. Nevertheless, this ruling marks a big blow to Apple in the big patent fight.