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Priority claimed from US07/131,913external-prioritypatent/US4822954A/en
Priority claimed from US07/193,736external-prioritypatent/US4857672A/en
Application filed by Minnesota Mining & MfgfiledCriticalMinnesota Mining & Mfg
Application grantedgrantedCritical
Publication of ATE102404T1publicationCriticalpatent/ATE102404T1/de