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Priority claimed from GB838302625Aexternal-prioritypatent/GB8302625D0/en
Priority claimed from GB08333770Aexternal-prioritypatent/GB2134494B/en
Application filed by Elevator Free Bloc Company LimfiledCriticalElevator Free Bloc Company Lim
Application grantedgrantedCritical
Publication of ATE41908T1publicationCriticalpatent/ATE41908T1/en