Derniers inventions, produits et services
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2015
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Invention
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Rail assembly and composite polymer crossties therefor. Disclosed are different embodiments of a ... |
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2005
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Invention
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Railway ties and structural elements.
A composite structural element and a method of making the ... |
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1993
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Invention
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Multi-layer composite block & process for manufacturing. A multi-layer molded composite paving bl... |
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1991
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Invention
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Composite block & process for manufacturing. A composite paving block formed from desired proport... |
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