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1. (WO1991007302) IMPROVEMENTS IN RAILWAY SIGNALLING SYSTEMS
Available information on National Phase entries(more information)
OfficeEntry DateNational NumberNational Status
European Patent Office 07.04.19921990917678Published: 02.09.1992
Granted: 09.03.1994
Finland 13.05.1992922188Granted: 30.03.2001