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Individual
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Individual
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Priority to ES6549ApriorityCriticalpatent/ES6549A1/en
Publication of ES6549A1publicationCriticalpatent/ES6549A1/en
ES6549A1886-12-221886-12-22
Improvements introduced in the printing of music for plain singing by means of special typographic characters.
ExpiredES6549A1
(en)
A cryptographic procedure applicable to lithography or typography to prevent the falsification of titles, bonds, commercial credits, letters, titles of Monte-píos, etc., using the chemical reactions of various salts.