Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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GERHOLD ALFRED
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GERHOLD ALFRED
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Application filed by GERHOLD ALFREDfiledCriticalGERHOLD ALFRED
Priority to ES0019628UpriorityCriticalpatent/ES19628Y/en
Publication of ES19628UpublicationCriticalpatent/ES19628U/en
Application grantedgrantedCritical
Publication of ES19628YpublicationCriticalpatent/ES19628Y/en
Improvements introduced in the manufacture of screws, characterized in that they have a portion of threaded shank and a protruding end that has a spiral notch that serves as a cutting tip, notch that begins at the tip of the projecting end and reaches the start of the normal thread to be confused with the normal valley of the thread. (Machine-translation by Google Translate, not legally binding)