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Beccherelli, Romeo (2002) Liquid crystal display panel. WO02073306 A1.
d'Alessandro, Antonio and Beccherelli, Romeo and Umenton, Cesare and Asquini, Rita and Donisi, Domenico and De Sio, Luciano and Caputo, Roberto (2008) Electro-optical tunable filter and manufacturing process. WO2008075397 A2 ; US7925124 B2.