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Priority claimed from US05/643,980external-prioritypatent/US4128304A/en
Application filed by American Optical CorpfiledCriticalAmerican Optical Corp
Publication of ATA904777ApublicationCriticalpatent/ATA904777A/de
Application grantedgrantedCritical
Publication of AT354129BpublicationCriticalpatent/AT354129B/de