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 GB7816/74Aexternal-prioritypatent/GB1500906A/en
Priority claimed from DE2413538Aexternal-prioritypatent/DE2413538C2/en
Application filed by Bochumer Eisen Heintzmann, Encoline LtdfiledCriticalBochumer Eisen Heintzmann
Publication of ZA75689BpublicationCriticalpatent/ZA75689B/en