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Publication of FR747810ApublicationCriticalpatent/FR747810A/fr
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
B21K1/00—Making machine elements
B21K1/44—Making machine elements bolts, studs, or the like
B21K1/46—Making machine elements bolts, studs, or the like with heads
B21K1/463—Making machine elements bolts, studs, or the like with heads with recessed heads
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FR747810D1932-10-181932-10-18Procédé, machine et outil pour la fabrication des organes d'entraînement des vis et vis comportant les dits organes
ExpiredFR747810A
(fr)