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Individual
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Individual
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Priority to ES0049310UpriorityCriticalpatent/ES49310Y/es
Publication of ES49310UpublicationCriticalpatent/ES49310U/es
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Publication of ES49310YpublicationCriticalpatent/ES49310Y/es
Saco de papel, compuesto de varias hojas, caracterizado por que una por lo menos de las hojas que lo forman, es de un papel dúplex, formado por dos capas de pasta de papel unidas en húmedo una a otra, durante la fabricación del papel, una de cuyas capas es continua, mientras que la otra es interrumpida y presenta porciones en las que falta la pasta quedando en estas porciones el papel de menor grueso que en el resto de la hoja.
ES0049310U1955-07-091955-07-09Saco de papel
ExpiredES49310Y
(es)