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Priority claimed from US07/870,415external-prioritypatent/US5214008A/en
Priority claimed from US07/876,350external-prioritypatent/US5344718A/en
Application filed by Guardian IndustriesfiledCriticalGuardian Industries
Application grantedgrantedCritical
Publication of TW246669BpublicationCriticalpatent/TW246669B/zh