Mealey's (May 17, 2018, 8:30 AM EDT) -- ALEXANDRIA, Va. — In a May 15 brief, a patent owner urges the Patent Trial and Appeal Board to reject an inter partes review (IPR) petitioner’s invocation of “issue joinder” as grounds for seeking IPR outside the statutorily mandated one-year window (Proppant Express Investments LLC v. Oren Technologies LLC, No. IPR2018-00914, PTAB)....