By Alina Selyukh WASHINGTON (Reuters) - A U.S. appeals court wrestled on Friday with a request by Apple Inc for a permanent injunction on sales of some phones made by its archrival, Samsung Electronics Co Ltd, in a case that could have a deep impact on patent litigation. Friday's hearing came hours ahead of an expected ruling by the International Trade Commission in a separate case on whether certain mobile devices made by South Korea's Samsung violate Apple patents. The ruling is expected around 5 p.m. EDT (2100 GMT). ...



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