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Priority claimed from GB44799/75Aexternal-prioritypatent/GB1512558A/en
Application filed by Scapa Porritt LtdfiledCriticalScapa Porritt Ltd
Priority to AT0864978ApriorityCriticalpatent/AT368562B/en
Publication of ATA864978ApublicationCriticalpatent/ATA864978A/en
Application grantedgrantedCritical
Publication of AT368562BpublicationCriticalpatent/AT368562B/en