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 GB08220969Aexternal-prioritypatent/GB2123690A/en
Application filed by Nat Res DevfiledCriticalNat Res Dev
Priority to ZA838113ApriorityCriticalpatent/ZA838113B/en
Publication of ZA838113BpublicationCriticalpatent/ZA838113B/en