Película instantánea (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Película instantánea" in Spanish language version.

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uspto.gov

U. S. Patent 5,216,438, Direct color thermal printing method for optically and thermally recording a full-color image on a thermosensitive recording medium, by S. Nakao, N. Katsuma and A. Nagata, Fuji Photo Film Co. (1993)Patente USPTO n.º 5,216,438
U. S. Patent 7,166,558, Thermal imaging system, Bhatt et al., (2007) Patente USPTO n.º 7,166,558