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Priority claimed from US06/205,440external-prioritypatent/US4397592A/en
Priority claimed from US06/214,233external-prioritypatent/US4398853A/en
Application filed by Kennametal Inc.filedCriticalKennametal Inc.
Application grantedgrantedCritical
Publication of ATE10714T1publicationCriticalpatent/ATE10714T1/en