Microsoft has successfully fended off a lawsuit over a set of controversial voice digitization patents, in a case that could have roiled the computer and Internet telephony industries if the patents had been upheld as valid.
The U.S. Court of Appeals for the Federal Circuit said in a 2-1 ruling on Tuesday that Multi-Tech Systems' patents were not violated and "we conclude that the district court did not err" in its earlier ruling that sided with Microsoft.
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