PT - JOURNAL ARTICLE AU - Friedmann, Alberto TI - Cinematographic Technology and Patents. Notes for Critical Analysis DP - 2007 Dec 1 TA - Iluminace PG - 61--75 VI - 19 IP - 4 IS - 0862397X AB - The article analyses in detail the situation of Italian cinematographic technology, development and inventions from the beginnings of cinema to the end of the 1940s, focusing on the years 1920-1934, while trying to find the causes of this situation.