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Priority claimed from US06/683,901external-prioritypatent/US4685101A/en
Priority claimed from US06/758,990external-prioritypatent/US4697262A/en
Application filed by Siemens AgfiledCriticalSiemens Ag
Application grantedgrantedCritical
Publication of ATE67361T1publicationCriticalpatent/ATE67361T1/en