In an electronic data processing system a system and method for providing an audible sound and a tactile feedback for a user. In one embodiment the data processing system includes a manually operable input device, a control circuit responsive to a first electrical signal indicative of the operation of...http://www.google.co.uk/patents/US4334280?utm_source=gb-gplus-sharePatent US4334280 - System and method for providing an audible sound and a tactile feedback in an electronic data processing system
