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Individual
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Individual
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Priority to ES28764ApriorityCriticalpatent/ES28764A1/es
Publication of ES28764A1publicationCriticalpatent/ES28764A1/es
ES28764A1901-11-131901-11-13Un nuevo producto industrial consistente en un combustible especial que se denomina carbón de piedra artificial.
ExpiredES28764A1
(es)