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PTAB Rejects Nu Mark's Challenge To E-Cig Patent

By Matthew Bultman (December 16, 2016, 4:54 PM EST) -- Electronic cigarette marker Nu Mark LLC lost a bid to invalidate claims in a rival's e-cigarette patent, after the Patent Trial and Appeal Board said Thursday the evidence that NuMark's arguments relied on had already been considered by a patent examiner....

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