Yes, there’s a seat-back pocket. No, you can’t use it

At least, on SkyWest which operates many United Express flights:

“Read the fine print.” That’s the advice of Joe Sharkey, the On the Road columnist for The New York Times[*1] . He warns us about the danger of putting any of your personal belongings – no matter how small – into the seatback pockets if you fly regional carrier SkyWest. He says on one recent SkyWest flight, a flight attendant enforced that regulation “like a drill sergeant throughout the flight.”

Solution? Avoid United, Skywest, US Airways, or any other Star Alliance airline like the plague until they sober up.