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Priority claimed from IT8767646Aexternal-prioritypatent/IT1211236B/it
Priority claimed from IT67110/88Aexternal-prioritypatent/IT1219021B/it
Application filed by Marelmo Di Marchigiano G EzzufiledCriticalMarelmo Di Marchigiano G Ezzu
Priority claimed from EP88830312Aexternal-prioritypatent/EP0302028B1/de
Application grantedgrantedCritical
Publication of ATE83721T1publicationCriticalpatent/ATE83721T1/de