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Priority claimed from US07/034,812external-prioritypatent/US4912874A/en
Application filed by Kamterter Products IncfiledCriticalKamterter Products Inc
Priority claimed from EP88903703Aexternal-prioritypatent/EP0309551B1/en
Application grantedgrantedCritical
Publication of ATE89445T1publicationCriticalpatent/ATE89445T1/en