United States Patent and Trademark Office

Outline		Indent Level
Color		Curly Brackets (indicating CPC extensions to IPC)

Printable version [PDF]
	CPC	COOPERATIVE PATENT CLASSIFICATION

B21G

MAKING NEEDLES, PINS OR NAILS

B21G 1/00

Making needles used for performing operations (forming heads on pin-like needles B21G 3/12; making U-shaped hairpins B21G 7/04)

B21G 1/003

{

Needles for special purposes, e.g. knitting, crochet, hat-pins

}

B21G 1/006

{

Special treatments of pins or needles, e.g. annealing, straightening

}

B21G 1/02

of needles with eyes, e.g. sewing-needles, sewing-awls

B21G 1/04

. .

of needles specially adapted for use in machines or tools

B21G 1/06

of needles with hook or barb, e.g. crochet hooks

B21G 1/08

of hollow needles or needles with hollow end, e.g. hypodermic needles, larding-needles (B21G 1/10 takes precedence)

B21G 1/10

equipped with locking means for the material to be drawn through, e.g. for repairing tubeless tyres

B21G 1/12

Securing, cleaning-off burrs, reconditioning polishing, grinding (takes precedence over B21G 1/02 to B21G 1/10)

B21G 3/00

Making pins, nails, or the like (of pins with individual caps B21G 5/00; of U-like shape B21G 7/00; of split-pins B21G 7/08)

B21G 3/005

{

Nails or pins for special purposes, e.g. curtain pins

}

B21G 3/02

of pins of the kind used in the tailoring trade or the house- hold

B21G 3/04

. .

with locking or shielding device for the pin point, e.g. safety-pins

B21G 3/06

of nails with shoulders

B21G 3/08

of nails with head and two or more shanks or split shanks

B21G 3/10

of undulated nails or pins

B21G 3/12

Upsetting; Forming heads

B21G 3/14

Reducing diameter of parts otherwise than by rolling

B21G 3/16

Pointing; with or without cutting

B21G 3/18

by operations not restricted to one of the groups B21G 3/12 to B21G 3/16 (B21G 3/06 to B21G 3/10 take precedence)

B21G 3/20

. .

from wire of indefinite length (by rolling B21G 3/30)

B21G 3/22

. . .

in pairs arranged head to head

B21G 3/24

. . .

by simultaneously forming the head of one nail and the adjacent point of another

B21G 3/26

. .

by cutting from strip or sheet material

B21G 3/28

. .

by forging or pressing

B21G 3/30

. .

by rolling

B21G 3/32

Feeding material to be worked to nail or pin making machines

B21G 5/00

Making pins or nails with attached caps or with coated heads

B21G 5/02

of drawing-pins or pins of drawing-pin type

B21G 7/00

Making pins of U-like shape or split-pins (of paper fasteners or staples B21D 53/46, B21F 45/16)

B21G 7/02

of U-like shape

B21G 7/04

. .

of hairpins

B21G 7/06

. . .

of undulated hairpins

B21G 7/08

of split-pins, e.g. cotter-pins