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 GB848423990Aexternal-prioritypatent/GB8423990D0/en
Application filed by Photographic Stationery CofiledCriticalPhotographic Stationery Co
Application grantedgrantedCritical
Publication of ATE45122T1publicationCriticalpatent/ATE45122T1/de