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Individual
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Individual
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Priority to ES87119UpriorityCriticalpatent/ES87119Y/es
Publication of ES87119UpublicationCriticalpatent/ES87119U/es
Application grantedgrantedCritical
Publication of ES87119YpublicationCriticalpatent/ES87119Y/es
Conjunto perfeccionado de tarjetas autoadhesivas con copias, caracterizado por ir cubierta cada hoja por la cara opuesta a aquella en la que se escribe de una tinta carbónica que realiza simultáneamente el calco sobre otra hoja situada bajo ella, de esta a otra, y así sucesivamente sin intervenir en el proceso papeles de calcar del tipo convencional, pues cada hoja es al propio tiempo hoja de copia y papel de calcar.
ES87119U1961-05-091961-05-09Conjunto perfeccionado de tarjetas autoadhesivas con copias
ExpiredES87119Y
(es)