ES336106A1 - Procedure for the preparation of paper protected against fraudulent alterations. (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the preparation of paper protected against fraudulent alterations. (Machine-translation by Google Translate, not legally binding)
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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N IBANEZ DE AYALA
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N IBANEZ DE AYALA
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Publication of ES336106A1publicationCriticalpatent/ES336106A1/en
Procedure for the preparation of paper protected against fraudulent alterations, characterized by treating the paper intended for documents that can be adulterated for falsification purposes, with a chemical compound in the form of invisible ink, which prints on said paper texts or drawings, which can be made visible when chemically reacting with the products usually used as borratintas. (Machine-translation by Google Translate, not legally binding)
ES336106A1966-11-281967-01-26Procedure for the preparation of paper protected against fraudulent alterations. (Machine-translation by Google Translate, not legally binding)
ExpiredES336106A1
(en)
A system of letters and numbers of the numbering system, in its different characters, for the learning of reading and writing in children (Machine-translation by Google Translate, not legally binding)
Letter paper with rectangular spaces on the margins of each page with advertising inserts. (Machine-translation by Google Translate, not legally binding)