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Individual
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Individual
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Priority to ES0035820UpriorityCriticalpatent/ES35820U/en
Publication of ES35820UpublicationCriticalpatent/ES35820U/en
"UNIVERSAL SCREWDRIVER", characterized in that it consists of a metal handle, very resistant and hollow, provided in its upper part with a piece intended to receive the impact of a hammer or mallet with a hole to vent air, and having inside it a spring that fits at one end on the head of a piston, resting on the blind end of the handle, introducing the piston inside it. (Machine-translation by Google Translate, not legally binding)
ES0035820U1953-04-211953-04-21Mineral screwdriver (Machine-translation by Google Translate, not legally binding)
PendingES35820U
(en)