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Priority claimed from DE19873706680external-prioritypatent/DE3706680A1/en
Priority claimed from DE19873717523external-prioritypatent/DE3717523C1/en
Priority claimed from DE19873735994external-prioritypatent/DE3735994A1/en
Application filed by Siemens AgfiledCriticalSiemens Ag
Priority claimed from EP87118185Aexternal-prioritypatent/EP0271071B1/en
Application grantedgrantedCritical
Publication of ATE87095T1publicationCriticalpatent/ATE87095T1/en