1. CPC Sections
  2. CPC Section B
  3. CPC Class B21
  4. CPC Subclass B21F
Printable version [PDF]
Version: 2026.01
Loading Scheme...
CPC
COOPERATIVE PATENT CLASSIFICATION
B21F
WORKING OR PROCESSING OF METAL WIRE (rolling of metal wire B21B 1/16; by drawing, auxiliary operations used in connection with metal-working without essentially removing material B21C) [2026-01]
Wire working characterised by operations performed [2013-01]
B21F 1/00
Bending wire other than coiling; Straightening wire [2013-01]
B21F 1/002
.
{by means of manually operated devices, e.g. pliers} [2013-01]
B21F 1/004
.
{by means of press-type tooling} [2013-01]
B21F 1/006
.
{in 3D with means to rotate the tools about the wire axis} [2013-01]
B21F 1/008
.
{in 3D with means to rotate the wire about its axis} [2013-01]
B21F 1/02
.
Straightening [2013-01]
B21F 1/023
. .
{in a device rotating about the wire axis} [2013-01]
B21F 1/026
. .
{Straightening and cutting} [2013-01]
B21F 1/04
.
Undulating [2013-01]
B21F 1/06
.
Bending wire-eyes [2013-01]
B21F 3/00
Coiling wire into particular forms [2013-01]
B21F 3/02
.
helically [2013-01]
B21F 3/027
. .
with extended ends formed in a special shape, e.g. for clothes-pegs [2013-01]
B21F 3/04
. .
externally on a mandrel or the like [2013-01]
B21F 3/06
. .
internally on a hollow form [2013-01]
B21F 3/08
.
to flat spiral [2013-01]
B21F 3/10
.
to spirals other than flat, e.g. conical [2013-01]
B21F 3/12
.
of interconnected helical springs [2013-01]
B21F 5/00
Upsetting wire [2026-01]
B21F 5/005
.
{Upsetting wire} [2013-01]
B21F 7/00
Twisting wire; Twisting wire together (for connections of limited size B21F 15/04) [2013-01]
B21F 9/00
Straining wire [2026-01]
B21F 9/002
.
{to maintain tension in the wire, e.g. to pull the wire taut} [2013-01]
B21F 9/005
.
{to affect the material properties of the wire} [2013-01]
B21F 9/007
.
{to induce a plastic deformation of the wire} [2013-01]
B21F 9/02
.
by tools adapted also for making connections [2013-01]
B21F 11/00
Cutting wire [2026-01]
B21F 11/005
.
{springs} [2013-01]
B21F 13/00
Splitting wire [2013-01]
B21F 15/00
Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire (tools for both straining and connecting B21F 9/02; jacketing or reinforcing B21F 17/00; manufacture of wire network B21F 27/00; in making bands B21F 43/00) [2026-01]
B21F 15/02
.
wire with wire [2013-01]
B21F 15/04
. .
without additional connecting elements or material, e.g. by twisting [2013-01]
B21F 15/06
. .
with additional connecting elements or material [2026-01]
B21F 15/08
. . .
making use of soldering or welding [2026-01]
B21F 15/10
.
wire with sheet metal [2013-01]
B21F 17/00
Jacketing or reinforcing articles with wire [2026-01]
B21F 19/00
Metallic coating of wire (by extruding B21C 23/24; by soldering or welding, e.g. cladding or plating, B23K) [2026-01]
B21F 23/00
Feeding wire in wire-working machines or apparatus [2026-01]
B21F 23/002
.
{Feeding means specially adapted for handling various diameters of wire or rod} [2013-01]
B21F 23/005
.
{Feeding discrete lengths of wire or rod} [2013-01]
B21F 23/007
. .
{using pick-up means, e.g. for isolating a predefined number of wires from a bundle} [2013-01]
Wire working characterised by the particular articles produced [2013-01]
B21F 25/00
Making barbed wire [2013-01]
B21F 27/00
Making wire network, i.e. wire nets (making meshed-ring network from wire B21F 31/00; in making bands B21F 43/00) [2026-01]
B21F 27/005
.
{Wire network per se} [2013-01]
B21F 27/02
.
without additional connecting elements or material at crossings, e.g. connected by knitting [2013-01]
B21F 27/04
. .
Manufacturing on machines with rotating blades or formers [2013-01]
B21F 27/06
. .
Manufacturing on twister-gear machines [2013-01]
B21F 27/08
.
with additional connecting elements or material at crossings [2013-01]
B21F 27/10
. .
with soldered or welded crossings [2026-01]
B21F 27/12
.
Making special types or portions of network by methods or means specially adapted therefor [2013-01]
B21F 27/121
. .
{of tubular form, e.g. as reinforcements for pipes or pillars} [2013-01]
B21F 27/122
. . .
{by attaching a continuous stirrup to longitudinal wires} [2013-01]
B21F 27/124
. . . .
{applied by rotation} [2013-01]
B21F 27/125
. . .
{by attaching individual stirrups to longitudinal wires} [2013-01]
B21F 27/127
. . .
{by bending preformed mesh} [2013-01]
B21F 27/128
. .
{of three-dimensional form by connecting wire networks, e.g. by projecting wires through an insulating layer} [2013-01]
B21F 27/14
. .
Specially bending or deforming free wire ends [2013-01]
B21F 27/16
. .
for spring mattresses [2013-01]
B21F 27/18
. .
of meshed work for filters or sieves [2013-01]
B21F 27/20
. .
of plaster-carrying network [2013-01]
B21F 27/22
. .
of network for wire-reinforced glass or the like [2013-01]
B21F 29/00
Making fencing or like material made partly of wire (B21F 25/00 takes precedence) [2026-01]
B21F 29/02
.
comprising bars or the like connected by wires [2013-01]
B21F 31/00
Making meshed-ring network from wire [2013-01]
B21F 33/00
Tools or devices specially designed for handling or processing wire fabrics or the like [2013-01]
B21F 33/002
.
{Coiling or packing wire network} [2013-01]
B21F 33/005
.
{Cutting wire network} [2013-01]
B21F 33/007
.
{Connecting wire network} [2013-01]
B21F 33/02
.
Mounting of wire network on frames [2013-01]
B21F 33/025
. .
{Mounting of mattress innersprings on borderframes} [2013-01]
B21F 33/04
.
Connecting ends of helical springs for mattresses [2013-01]
B21F 35/00
Making springs from wire [2026-01]
B21F 35/003
.
{Multi-filament springs, e.g. made of stranded, braided, cable or multi-filament material} [2013-01]
B21F 35/006
.
{Double-twist coil springs} [2026-01]
B21F 35/02
.
Bending or deforming ends of coil springs to special shape [2013-01]
B21F 35/04
.
Making flat springs, e.g. sinus springs [2013-01]
B21F 37/00
Manufacture of rings from wire [2026-01]
B21F 37/02
.
of resilient rings, e.g. key-rings [2013-01]
B21F 37/04
.
of washers (B21F 37/02 takes precedence) [2013-01]
B21F 39/00
Making wheel spokes from wire [2013-01]
B21F 41/00
Making umbrella frames or members from wire [2013-01]
B21F 43/00
Making bands, e.g. bracelets, from wire [2026-01]
B21F 45/00
Wire-working in the manufacture of other particular articles (of pins, needles, nails, hairpins B21G; of chains B21L) [2026-01]
B21F 45/002
.
{of frames for spectacles} [2013-01]
B21F 45/004
.
{Mounting bails on containers} [2013-01]
B21F 45/006
.
{of concrete reinforcement fibres} [2013-01]
B21F 45/008
.
{of medical instruments, e.g. stents or corneal rings} [2026-01]
B21F 45/02
.
of clothes hangers [2013-01]
B21F 45/04
.
of elements, e.g. levers or links, for bottle stoppers [2013-01]
B21F 45/06
.
of flexible shafts or hollow conduits, e.g. for Bowden mechanisms [2013-01]
B21F 45/08
.
of loom heddles [2013-01]
B21F 45/10
.
of cards for fabric-napping machines [2013-01]
B21F 45/12
.
of fishing hooks [2013-01]
B21F 45/14
.
of end-pieces for laces or ropes [2013-01]
B21F 45/16
.
of devices for fastening or securing purposes [2013-01]
B21F 45/18
. .
of slide fastener elements [2013-01]
B21F 45/20
. .
of spring hooks; of spring safety hooks [2026-01]
B21F 45/22
. .
of paper fasteners or clips (staples B21F 45/24) [2013-01]
B21F 45/24
. .
of staples; of belt-fastening elements [2013-01]
B21F 45/26
. .
of buttons [2013-01]
B21F 45/28
. . .
of "patent-fastener" or press-button type [2013-01]
B21F 99/00
Subject matter not provided for in other groups of this subclass [2013-01]