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HUMBRIAS BARBA MARIANO
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HUMBRIAS BARBA MARIANO
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Application filed by HUMBRIAS BARBA MARIANOfiledCriticalHUMBRIAS BARBA MARIANO
Priority to ES0039275UpriorityCriticalpatent/ES39275Y/en
Publication of ES39275UpublicationCriticalpatent/ES39275U/en
Application grantedgrantedCritical
Publication of ES39275YpublicationCriticalpatent/ES39275Y/en
New calculation rule for drawing with automatic sliding device, characterized by having a graduated rule that extends inferiorly, that is, by the part opposite to the line of stroke, in a hollow body or appendix, of semicircular projection and with the tangent face to the flat and open drawing surface, serving as a housing for a cylinder that is held at its ends to the sides of the body that contains it by spikes or spikes and freely rotates inside it. (Machine-translation by Google Translate, not legally binding)
ES0039275U1953-11-271953-11-27
New slide rule for drawing with automatic sliding device
ExpiredES39275Y
(en)