In International Business Machines Corporation v. Intellectual Ventures II LLC, IPR2014-00587, Paper 27 (November 28, 2014), the Board declined to limit the scope of the patent owner’s cross-examination of petitioner’s witness.  Petitioner sought to limit cross examination only to the grounds instituted by the Board.  The Board noted that the scope of cross examination is normally limited to the scope of the direct examination. 37 C.F.R. § 42.53(d)(5)(ii). While the Board agreed that the most pertinent portions of the direct testimony may be related to the instituted ground, it was not persuaded that the remaining portions would not be relevant. The testimony could be relevant to the state of the prior art or the credibility of the declarant, and therefore the Board declined to further limit the scope of cross-examination.