Patently Absurd discusses several of Arthur Pedrick’s inventions including the following:
UK Patent No. GB1251780. A practice golf tee. Photocells monitor the path of the club head. If they detect that the player is about to hook or slice the ball, a puff of compressed air passes along the conduit 1″ and up the middle of the tee. This blows the ball off the tee so that the player misses it, and does not have to search for a lost ball.
(Thanks to BoingBoing for the link)
Update: Pedrick’s invention is an improvement on George Grant’s 1899 invention of the golf tee.