Solicitud de The Butters Patent para inscribir el invento: Hoja de filtrar de bajo costo, construcción sencilla de filtrado económico y desalojamiento satisfactorio en extracción de valor en lodos minerales

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CR AN CR-AN-AH-MAG-PATEN-000125

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1914-04-20 - ? (Creation)

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Ministerio de Agricultura y Ganadería

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Archivo Nacional

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Item CR-AN-AH-MAG-PATEN-000125 - Solicitud de The Butters Patent para inscribir el invento: Hoja de filtrar de bajo costo, construcción sencilla de filtrado económico y desalojamiento satisfactorio en extracción de valor en lodos minerales