Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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B21G
MAKING NEEDLES, PINS OR NAILS OF METAL
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3/00
Making pins, nails, or the like
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B21G3/18
by operations not restricted to one of the groups B21G3/12 - B21G3/16
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B21G3/20
from wire of indefinite length
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B21G3/22
in pairs arranged head to head
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