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 GB2855273Aexternal-prioritypatent/GB1437719A/en
Application filed by F E TattamfiledCriticalF E Tattam
Priority claimed from GB4408574Aexternal-prioritypatent/GB1470893A/en
Publication of DK321074ApublicationCriticalpatent/DK321074A/da