A control device including a support and multiple cylinders. A first cylinder may be rotated and translated, and a first sensor senses the rotation of the first cylinder and outputs a first control signal representative of the rotation. A second cylinder is positioned parallel to the first cylinder and...http://www.google.fr/patents/US6300938?utm_source=gb-gplus-shareBrevet US6300938 - Multiple-cylinder control device for computers and other electronic apparatus
Multiple-cylinder control device for computers and other electronic apparatus
