FR1299187A - Procédé d'obtention de la fente annulaire latérale et bombée entourant la bille des crayons à bille, et dispositif de mise en oeuvre de ce procédé
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Procédé d'obtention de la fente annulaire latérale et bombée entourant la bille des crayons à bille, et dispositif de mise en oeuvre de ce procédé
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Priority claimed from AT563460Aexternal-prioritypatent/AT232356B/de
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Priority to FR868575ApriorityCriticalpatent/FR1299187A/fr
Application grantedgrantedCritical
Publication of FR1299187ApublicationCriticalpatent/FR1299187A/fr
B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
B43K—IMPLEMENTS FOR WRITING OR DRAWING
B43K1/00—Nibs; Writing-points
B43K1/08—Nibs; Writing-points with ball points; Balls or ball beds
FR868575A1960-07-221961-07-21Procédé d'obtention de la fente annulaire latérale et bombée entourant la bille des crayons à bille, et dispositif de mise en oeuvre de ce procédé
ExpiredFR1299187A
(fr)