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Priority claimed from US05/607,842external-prioritypatent/US4113344A/en
Priority claimed from AT617177Aexternal-prioritypatent/AT355865B/de
Application filed by American Optical CorpfiledCriticalAmerican Optical Corp
Publication of ATA732577ApublicationCriticalpatent/ATA732577A/de
Application grantedgrantedCritical
Publication of AT352439BpublicationCriticalpatent/AT352439B/de