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Individual
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Individual
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Priority to ES36821ApriorityCriticalpatent/ES36821A3/es
Publication of ES36821A3publicationCriticalpatent/ES36821A3/es
Un procedimiento de troqueles dobles combinados para picar papel de vasares y aparadores en cualquier dibujo, dimensiones y clase de material que en su construcción se emplee.
Un procedimiento de fabricación de papel impermeable con dos hojas de papel continuo superpuestas, sirviendo la composición impermeable como materia de unión de las dos hojas denominado "Dúplex".