(May 7, 2018, 3:36 PM EDT) -- ALEXANDRIA, Va. — Myriad claims of a patent relating to wind turbines with “low voltage ride through” (LVRT) recite “an obvious and simple solution to a well-known problem,” according to a May 4 petition for inter partes review (IPR) filed with the Patent Trial and Appeal Board (Vestas-American Wind Technology Inc., et al. v. General Electric Co., No. IPR2018-01029, PTAB)....