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Priority claimed from US07/089,228external-prioritypatent/US4872558A/en
Application filed by Daniel A PharofiledCriticalDaniel A Pharo
Priority claimed from EP88307838Aexternal-prioritypatent/EP0306207B1/de
Application grantedgrantedCritical
Publication of ATE87578T1publicationCriticalpatent/ATE87578T1/de