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Individual
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Individual
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Priority to ES0031931UpriorityCriticalpatent/ES31931U/es
Publication of ES31931UpublicationCriticalpatent/ES31931U/es
Hojas de envoltura impermeables al paso del aire, que están esencialmente caracterizadas por el hecho de estar constituidas por hojas de papel o de un material laminar semejante, al cual le ha sido aplicada una preparación, más o menos superficial o embebida, de sales de difenil en disolución o licuadas.
ES0031931U1952-07-051952-07-05Hojas de envoltura impermeables al paso del aire
PendingES31931U
(es)