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
Priority claimed from GB3306/60Aexternal-prioritypatent/GB878740A/en
Application filed by Gevaert Photo Prod NvfiledCriticalGevaert Photo Prod Nv
Publication of BE599627ApublicationCriticalpatent/BE599627A/nl