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Priority claimed from US06/893,153external-prioritypatent/US4706987A/en
Priority claimed from US07/065,725external-prioritypatent/US4733884A/en
Application filed by Specialty Products IncfiledCriticalSpecialty Products Inc
Application grantedgrantedCritical
Publication of ATE80098T1publicationCriticalpatent/ATE80098T1/de