A joystick controller comprises a housing (10) and a joystick (12) mounted for pivotal movement relative to the housing (10) by means of a ball (14) and socket joint (18,20). A yoke (18) resolves directional movement of the joystick (12) into a component direction. A sensor senses movement of the yoke...http://www.google.com.hk/patents/US7429977?utm_source=gb-gplus-share專利 US7429977 - Joystick controller
