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Gianfranco Cremaschi
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Gorlago, IT
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Patent Grant
Components for ballast-less railroad lines laid on pre-fabricated r...
Patent number
4,703,890
Issue date
Nov 3, 1987
I.P.A. S.p.A. Industria Prefabbricati
Pietro Tognoli
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES