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Priority claimed from GB38772/77Aexternal-prioritypatent/GB1600496A/en
Application filed by Coloroll LtdfiledCriticalColoroll Ltd
Priority to AT426781ApriorityCriticalpatent/AT381108B/de
Publication of ATA426781ApublicationCriticalpatent/ATA426781A/de
Application grantedgrantedCritical
Publication of AT381108BpublicationCriticalpatent/AT381108B/de