The Patent Act, as amended by the AIA, includes a one-year window for filing a petition for inter partes review after service of a complaint on the real party in interest or a privy. See 35 U.S.C. 315(b). The one-year bar has an exception: If a trial is instituted on the same patent, a petitioner that would otherwise be barred from filing a petition can, within one month of institution of a trial on that patent, file a petition accompanied by a motion for joinder, seeking to participate in the trial proceedings. The Board has granted several of these motions to date. In a recent proceeding, both the patent owner and the petitioner opposed a motion for joinder filed by a third party. They raised concerns about serial motions for joinder. Specifically, they argued that under the Board’s interpretation of the statute and the rules, once a first motion for joinder is granted and trial is instituted, yet another would-be petitioner could file a motion for joinder based on the institution of trial in the joined proceeding, essentially allowing the one-year bar to be extended indefinitely. The Board addressed this concern noting that joinder is always discretionary: “the Board has the discretion to join a party,” and that “does not mean that joinder is automatic, particularly given the need to complete the proceedings in a just, speedy, and inexpensive manner.” Dell Inc. v. Network-1 Security Solutions, Inc., IPR2013-00385, Paper 17 (Jul. 29, 2013). It appears that shortly after this decision, another party raised the prospect of joining the existing proceedings. The patent owner, original petitioner, and the petitioner in the joined proceedings have until August 13, 2013 to file oppositions to the motion for joinder. Avaya Inc. v. Network-1 Security Solutions, Inc., IPR2013-00071, Paper 41 (Aug. 7, 2013); see also Sony Corp. of Am. v. Network-1 Security Solutions, Inc., IPR2013-00386, Paper 16 (Jul. 29, 2013).