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ES6481A1886-12-011886-12-01Un procedimiento para la reducción y la fusión de los minerales de hierro por medio de óxido de carbono.
ExpiredES6481A1
(es)
Un procedimiento mecánico para la comprobación de los cobros que verifican los conductores de tranvías y otros empleos análogos, por medio del aparato que se describe.
Un procedimiento para separar las partículas de hierro de las sustancias o mezclas que lo contengan, por medio del aparato electro-magnético separador que se describe.