Apple has won a small victory in its long standing case against Google's Motorola, reports Bloomberg, after the United States International Trade Commission (ITC) upheld an earlier invalidation of a patent that threatened imports of the iPhone 4 into the U.S.The decision marks the latest instance in which neither Cupertino, California-based Apple nor Google has been able to strike a decisive blow against its competitor in a squabble that began more than two years ago. Each has claimed the other is infringing patents, and Apple accused Motorola Mobility of breaching obligations to license some of its most widely used technology on fair terms.