An operational panel capable of expanding the number of function menus to be selected. The operation panel has a cover 8 which is formed with display window 7a to 7d and equipped with push buttons 10a to 10d, respectively, at the side of the display windows 7a to 7d. The operation panel cover 8 is arranged...http://www.google.co.uk/patents/US5424729?utm_source=gb-gplus-sharePatent US5424729 - Function selecting operation panel
