In Owens Corning v. Fast Felt Corp, Fast Felt sued Owens Corning for infringement, and Owens Corning filed a petition with the PTO seeking inter partes review of claims 1, 2, 4, 6, and 7. All of the challenged claims contain the term “roofing or building cover material.” Owens Corning argued that the claims are obvious over Lassiter, Hefele, and Eaton. The Board concluded that Owens Corning failed to show obviousness of any of the challenged claims... While the preferred embodiment of a claim might focus on a particular element of the claim, this is not enough to narrow the claim scope of the IPR. The Board must still give the claim its broadest reasonable interpretation in light of the specification. Where the record and a correct claim construction support only one result, reversal is warranted, without need for remand.
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