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Priority claimed from US06/087,149external-prioritypatent/US4276360A/en
Priority claimed from US06/119,972external-prioritypatent/US4352977A/en
Application filed by Hardigg Ind IncfiledCriticalHardigg Ind Inc
Priority claimed from EP19840110895external-prioritypatent/EP0144569B1/en
Application grantedgrantedCritical
Publication of ATE60463T1publicationCriticalpatent/ATE60463T1/en