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Priority claimed from JP4486680Aexternal-prioritypatent/JPS56141374A/en
Priority claimed from JP55159406Aexternal-prioritypatent/JPS5785500A/en
Application filed by Hayakawa Rubber Company LimitedfiledCriticalHayakawa Rubber Company Limited
Priority claimed from EP81301443Aexternal-prioritypatent/EP0037717B2/en
Application grantedgrantedCritical
Publication of ATE8058T1publicationCriticalpatent/ATE8058T1/en