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Individual
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Priority to ES0308020ApriorityCriticalpatent/ES308020A1/en
Publication of ES308020A1publicationCriticalpatent/ES308020A1/en
Perfection in spinning tubes, consisting of a cylindrical body comprising a frustoconical axial vacuum whose greater base is located at the base of the tube, characterized in that the tube is provided with longitudinal grooves whose cross section grows from the base to the tip of the tube , more rapidly than the corresponding cross section of the interior vacuum decreases. (Machine-translation by Google Translate, not legally binding)
ES0308020A1964-12-311964-12-31Improvements in hilature tubes. (Machine-translation by Google Translate, not legally binding)
ExpiredES308020A1
(en)