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.)
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Publication date
Priority claimed from GB838331234Aexternal-prioritypatent/GB8331234D0/en
Application filed by Aberlan Equipment & Service CofiledCriticalAberlan Equipment & Service Co
Application grantedgrantedCritical
Publication of ATE41333T1publicationCriticalpatent/ATE41333T1/en