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Priority claimed from US06/446,915external-prioritypatent/US4561055A/en
Application filed by Deere & CofiledCriticalDeere & Co
Priority claimed from EP83112240Aexternal-prioritypatent/EP0110428B1/de
Application grantedgrantedCritical
Publication of ATE46295T1publicationCriticalpatent/ATE46295T1/de