ES253240A2 - Improvements included in the bolºgrafos retention and expulsion mechanisms (Machine-translation by Google Translate, not legally binding)
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Improvements included in the bolºgrafos retention and expulsion mechanisms (Machine-translation by Google Translate, not legally binding)
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Improvements in the object of the main patent no. 246577 for improvements introduced in the mechanisms of retention and ejection of the pens, characterized by arranged in the central axis forming ring projections in the form of saw teeth, and opposite these projections, other teeth of saw but alternating these last ones with rectangular planes that deepen in the cited central axis in a dimension equal to the one of the retroactil route. (Machine-translation by Google Translate, not legally binding)
ES0253240A1959-11-071959-11-07Improvements included in the bolºgrafos retention and expulsion mechanisms (Machine-translation by Google Translate, not legally binding)
ExpiredES253240A2
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