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Individual
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Individual
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Priority to ES1969145666UpriorityCriticalpatent/ES145666Y/es
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Publication of ES145666YpublicationCriticalpatent/ES145666Y/es
Un botón automático perfeccionado, caracterizado porque consiste en una pieza principal de cuyo centro arranca un espárrago o vástago rematado en punta y que poco antes de esta tiene practicada una o varias ranuras.