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Priority to ES1968143471UpriorityCriticalpatent/ES143471Y/en
Publication of ES143471UpublicationCriticalpatent/ES143471U/en
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Publication of ES143471YpublicationCriticalpatent/ES143471Y/en
New type of screw, which is essentially characterized by the fact that, following its thread area, it has between it and the head, a truncated-pyramidal extension whose number of faces is variable. (Machine-translation by Google Translate, not legally binding)
ES1968143471U1968-11-261968-11-26
NEW TYPE OF SCREW.
ExpiredES143471Y
(en)