A position indication device, e.g., for controlling the position of a cursor or other object on the screen of a display monitor of an information processing system, includes a position plate that is translationally movable by a user to indicate a corresponding change in position on the display screen...http://www.google.de/patents/US5400054?utm_source=gb-gplus-sharePatent US5400054 - Manually operable device for indicating position on a display screen
