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Priority to ES0014871UpriorityCriticalpatent/ES14871Y/es
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Publication of ES14871YpublicationCriticalpatent/ES14871Y/es
Un libro de hojas sueltas, caracterizado por que sus hojas perforadas se ensartan en cintas elásticas rígidas que se encajan por ambos extremos en la tapa del libro.
ES0014871U1946-08-101946-08-10Libro de hojas sueltas.
ExpiredES14871Y
(es)
Libro compuesto de varios cuadernos independientes, acoplados en número indefinido, con índice nuevo y especial en su centro, que aparece en su totalidad al abrir el libro.