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Priority claimed from GB848410847Aexternal-prioritypatent/GB8410847D0/en
Priority claimed from GB848410845Aexternal-prioritypatent/GB8410845D0/en
Application filed by Westinghouse Brake & SignalfiledCriticalWestinghouse Brake & Signal
Publication of IN160760BpublicationCriticalpatent/IN160760B/en