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Priority claimed from US06/913,131external-prioritypatent/US4733778A/en
Priority claimed from US07/046,259external-prioritypatent/US4842135A/en
Application filed by Illinois Tool WorksfiledCriticalIllinois Tool Works
Priority claimed from EP87308505Aexternal-prioritypatent/EP0276539B1/de
Application grantedgrantedCritical
Publication of ATE79510T1publicationCriticalpatent/ATE79510T1/de