Every cramped air traveler may have the right to lean his seat back, but Ira Goldman sees airplane justice from another perspective — that of the person behind — and he's found a way to even the score.
Goldman invented the Knee Defender, a beeper-sized block of plastic that lets passengers prevent the seat in front of them from reclining.
The gadget, which went on sale about a month ago on the Internet for $10, has sparked heated debate in online chat rooms, and aviation officials worry about the disagreements that will be generated at 30,000 feet.
