A system for controlling an apparatus (11, 21, 31), which system comprises a control unit (13, 23, 33) adapted to transfer control signals to the apparatus dependent on the control data. Said control unit comprises data input means (14, 24, 34, 44) to input said control data, and said apparatus comprises...http://www.google.es/patents/US6798359?utm_source=gb-gplus-sharePatente US6798359 - Control unit with variable visual indicator
