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Priority claimed from DE8912171Uexternal-prioritypatent/DE8912171U1/de
Priority claimed from DE9002459Uexternal-prioritypatent/DE9002459U1/de
Application filed by Alfons SchalkfiledCriticalAlfons Schalk
Priority claimed from EP90916205Aexternal-prioritypatent/EP0495906B1/de
Application grantedgrantedCritical
Publication of ATE105497T1publicationCriticalpatent/ATE105497T1/de