Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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B21C
MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
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1/00
Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
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B21C1/02
Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
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B21C1/04
with two or more dies operating in series
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