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Priority claimed from JP1448386Uexternal-prioritypatent/JPS62127536U/ja
Priority claimed from JP16032786Uexternal-prioritypatent/JPH0422336Y2/ja
Application filed by Asahi Optical Co LtdfiledCriticalAsahi Optical Co Ltd
Priority claimed from EP87901116Aexternal-prioritypatent/EP0292560B1/de
Application grantedgrantedCritical
Publication of ATE85136T1publicationCriticalpatent/ATE85136T1/de