Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vittorio BenagliafiledCriticalVittorio Benaglia
Publication of CH56175ApublicationCriticalpatent/CH56175A/fr
Boite portative servant à renfermer les écrans transparents et opaques faits par procédés chimiques destinés à l'usage cinématographique et au besoin servir de fonds pour la photographie