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Manhole
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Patent number 4,499,695
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Issue date Feb 19, 1985
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Pont-A-Mousson S.A.
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Jacques Oger
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Road inspection manhole
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Patent number 4,456,397
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Issue date Jun 26, 1984
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Centre de Recherches de Pont A Mousson
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Jean L. Freis
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Voussoir for a casing
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Patent number 4,037,417
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Issue date Jul 26, 1977
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Pont-A-Mousson S.A.
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Jacques Oger
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E21 - EARTH DRILLING MINING
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Casing panel
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Patent number 3,996,752
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Issue date Dec 14, 1976
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Pont-A-Mousson S.A.
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Jacques Oger
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E21 - EARTH DRILLING MINING
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Casing voussoir
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Patent number 3,984,956
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Issue date Oct 12, 1976
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Pont-A-Mousson S.A.
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Jacques Francois Oger
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E21 - EARTH DRILLING MINING
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Man-hole assembly
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Patent number 3,977,124
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Issue date Aug 31, 1976
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Pont-A-Mousson S.A.
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Jacques Oger
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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