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Priority claimed from US06/418,216external-prioritypatent/US4424165A/en
Priority claimed from US06/508,602external-prioritypatent/US4511515A/en
Application filed by Corning Glass WorksfiledCriticalCorning Glass Works
Priority claimed from EP83305119Aexternal-prioritypatent/EP0103447B1/de
Application grantedgrantedCritical
Publication of ATE21382T1publicationCriticalpatent/ATE21382T1/de