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Individual
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Individual
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Priority to ES0005641UpriorityCriticalpatent/ES5641U/es
Publication of ES5641UpublicationCriticalpatent/ES5641U/es
Sobre de cierre automatico mediante hallarse provisto de una doble pestaña impregnada de determinada sustancia química sustitutiva de la goma usual de modo que con la simple presión de los dedos se produce el cierre indicado sin necesidad de líquido o elemento extraño alguno.
ES0005641U1939-10-061939-10-06Un sobre de cierre automático
PendingES5641U
(es)