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Priority claimed from DE19843413797external-prioritypatent/DE3413797A1/de
Priority claimed from DE19843422840external-prioritypatent/DE3422840A1/de
Priority claimed from DE19843438691external-prioritypatent/DE3438691A1/de
Application filed by Helmut SilberzahnfiledCriticalHelmut Silberzahn
Priority claimed from EP85104404Aexternal-prioritypatent/EP0159625B1/de
Application grantedgrantedCritical
Publication of ATE61256T1publicationCriticalpatent/ATE61256T1/de