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Individual
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Individual
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Priority claimed from CH293676Aexternal-prioritypatent/CH591921A5/xx
Application filed by IndividualfiledCriticalIndividual
Publication of ES456700A1publicationCriticalpatent/ES456700A1/en
Process for the manufacture of screws, of the type having a head and a threaded shaft, characterized in that it comprises the steps of continuously machining a thread on an elongated rod or bar, cutting a threaded rod shaft of the rod, machining separately a screw head, and hold the screw head and the shaft by welding. (Machine-translation by Google Translate, not legally binding)
ES456700A1976-03-101977-03-10Procedure for the manufacture of screws. (Machine-translation by Google Translate, not legally binding)
ExpiredES456700A1
(en)