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 Henri Joseph MerschfiledCriticalHenri Joseph Mersch
Priority to BE590438ApriorityCriticalpatent/BE590438A/fr
Publication of BE590438ApublicationCriticalpatent/BE590438A/fr
BE590438A1960-05-031960-05-03Procédé destiné à la publicité, qui consiste à rendre transparent, à l'éclairage indirect, un écran opaque.
BE590438A
(fr)