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Individual
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Individual
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Priority to ES54887ApriorityCriticalpatent/ES54887A1/es
Publication of ES54887A1publicationCriticalpatent/ES54887A1/es
ES54887A1913-02-111913-02-11Un procedimiento que facilita la apertura de los sobres de cartas sin el menor deterioro de éstos ni su contenido.
ExpiredES54887A1
(es)
Nuevo procedimiento para abrir con facilidad toda clase de sobres, sin necesidad de exponerse a romper el escrito que contenga en su interior y sin recurrir a ningún útil.