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Drainage device
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Patent number 4,353,387
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Issue date Oct 12, 1982
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Delle-Alsthom
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Pierre A. Bouygues
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Earthquake protector
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Patent number 4,330,103
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Issue date May 18, 1982
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Delle-Alsthom
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Edmond Thuries
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Gas-blast circuit-breaker
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Patent number 4,295,023
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Issue date Oct 13, 1981
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Delle-Alsthom
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Edmond Thuries
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H01 - BASIC ELECTRIC ELEMENTS
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Compensated force valve with two seats
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Patent number 4,239,180
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Issue date Dec 16, 1980
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Delle-Alsthom
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Edmond Thuries
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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