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Priority claimed from US05/765,198external-prioritypatent/US4091829A/en
Application filed by Kerotest Mfg CorpfiledCriticalKerotest Mfg Corp
Publication of IT7805118A0publicationCriticalpatent/IT7805118A0/it
Application grantedgrantedCritical
Publication of IT1102218BpublicationCriticalpatent/IT1102218B/it