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Priority claimed from US06/562,624external-prioritypatent/US4568909A/en
Priority claimed from US06/632,071external-prioritypatent/US4622538A/en
Application filed by Otis Elevator CofiledCriticalOtis Elevator Co
Priority claimed from EP19840308906external-prioritypatent/EP0146412B1/de
Application grantedgrantedCritical
Publication of ATE25838T1publicationCriticalpatent/ATE25838T1/de