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Individual
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Individual
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Priority to ES212712ApriorityCriticalpatent/ES212712A3/en
Publication of ES212712A3publicationCriticalpatent/ES212712A3/en
Improvements introduced in the construction of pens characterized in that the upper part or cap of the outer body of the ballpoint pen is fixed to a bushing through which a central guide rod of the inner body of the ballpoint pen slides and which is actuated by means of a button attached to said central stem through a hole made in the upper part of said cap. (Machine-translation by Google Translate, not legally binding)
ES212712A1953-12-151953-12-15Improvements introduced in the construction of ballpoints (Machine-translation by Google Translate, not legally binding)
ExpiredES212712A3
(en)