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Microsoft Loses Court Ruling in Uniloc Patent Case

Microsoft Corp., the world’s biggest software maker, infringed a patent on technology used to deter piracy, an appeals court ruled in a decision that may change how damages are calculated in future cases.

The ruling by the U.S. Court of Appeals for the Federal Circuit in Washington today upholds the validity of a patent owned by Uniloc USA Inc. and Uniloc Singapore Private Ltd., while ordering a new trial to reassess the damages Microsoft should pay.