A federal district court erred in ruling that 34 claims of a patent on a system and method of using a graphical indicator were invalid as indefinite, the U.S. Court of Appeals for the Federal Circuit has ruled. Because a skilled artisan would understand, with reasonable certainty, the meaning of the term “visually negligible,” and because the intrinsic evidence supported—and the extrinsic evidence was consistent with—that conclusion, the district court’s invalidity ruling was reversed (Sonix Technology Company, Ltd. v. Publications International, Ltd., January 5, 2016, Lourie, A.).

A full summary of this case has been published on Kluwer IP Law.


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