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Priority claimed from US06/610,688external-prioritypatent/US4555048A/en
Priority claimed from US06/643,070external-prioritypatent/US4618078A/en
Application filed by Rieke CorpfiledCriticalRieke Corp
Application grantedgrantedCritical
Publication of ATE42080T1publicationCriticalpatent/ATE42080T1/de