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Priority claimed from CH7613959Aexternal-prioritypatent/CH386376A/de
Priority claimed from FR40619Aexternal-prioritypatent/FR1263571A/fr
Application filed by Roover LtdfiledCriticalRoover Ltd
Application grantedgrantedCritical
Publication of BE600975RpublicationCriticalpatent/BE600975R/fr