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Priority to ES83996UpriorityCriticalpatent/ES83996Y/es
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NUEVA TAPA PARA LIBROS, de las constituidas por una lámina flexible o no doblada sobre sí para dar lugar a las dos cubiertas del mismo, caracterizada esencialmente por al hecho de que tiene fijados por los medios cualesquiera ambos extremos de un elemento elástico longitudinal, fijados en sentido divergente en lugares próximos a las cantoneras de una misma cubierta; preferentemente la cubierta posterior, y que constituye el sistema de cierre del libro.
ES83996U1960-11-071960-11-07Tapa para libros
ExpiredES83996Y
(es)