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Individual
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Individual
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Priority to ES0056295UpriorityCriticalpatent/ES56295Y/en
Publication of ES56295UpublicationCriticalpatent/ES56295U/en
Application grantedgrantedCritical
Publication of ES56295YpublicationCriticalpatent/ES56295Y/en
Improved pencil with calculating device that is characterized in that the cover is sliding and presents its upper face in half cane, carrying a pencil at its front end to sharpen the pencils, and on the engraved or printed bulged surface, a ruler graduated millimetrically in one of its edges, and in the central zone the columns of the Pythagorean table with the peculiarity that the centimetric figures of the rule constitute the initial number of said columns, these being displaced in a place in relation to said figures. (Machine-translation by Google Translate, not legally binding)
ES0056295U1956-09-141956-09-14
Perfected pencil case with calculating device
ExpiredES56295Y
(en)