The huge wave of America Invents Act proceedings at the Patent Trial and Appeal Board decisions is starting to crash on the U.S. Court of Appeals for the Federal Circuit. This past week the court heard 13 appeals from PTAB decisions, nearly half its August calendar.

Patent owners—and even a couple of accused infringers—complained they’d been burned by decisions that were unfair, one-sided and mined with procedural booby-traps.