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Priority claimed from US422966Aexternal-prioritypatent/US3884660A/en
Application filed by Perry Equipment CorpfiledCriticalPerry Equipment Corp
Priority to AT116380ApriorityCriticalpatent/AT376141B/en
Publication of ATA116380ApublicationCriticalpatent/ATA116380A/en
Application grantedgrantedCritical
Publication of AT376141BpublicationCriticalpatent/AT376141B/en