IPC Classification

Class code (prefix) Descriptions Number of results
B21K 1/00 Making machine elements
B21K 1/02 Making machine elements balls, rolls, or rollers, e.g. for bearings
B21K 1/04 Making machine elements ball-races
B21K 1/05 Making machine elements cages for bearings
B21K 1/06 Making machine elements axles or shafts
B21K 1/08 Making machine elements axles or shafts crankshafts
B21K 1/10 Making machine elements axles or shafts of cylindrical form
B21K 1/12 Making machine elements axles or shafts of specially-shaped cross-section
B21K 1/14 Making machine elements fittings
B21K 1/16 Making machine elements fittings parts of pipe or hose couplings
B21K 1/18 Making machine elements pistons or plungers
B21K 1/20 Making machine elements valve parts
B21K 1/22 Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
B21K 1/24 Making machine elements valve parts valve seats
B21K 1/26 Making machine elements housings or supporting parts, e.g. axle housings, engine mountings
B21K 1/28 Making machine elements discs
B21K 1/30 Making machine elements discs with gear-teeth
B21K 1/32 Making machine elements discs discs, e.g. disc wheels
B21K 1/34 Making machine elements discs wheels with spokes
B21K 1/36 Making machine elements discs with blades
B21K 1/38 Making machine elements discs tyres
B21K 1/40 Making machine elements discs hubs
B21K 1/42 Making machine elements discs pulleys, e.g. cable pulleys
B21K 1/44 Making machine elements bolts, studs, or the like
B21K 1/46 Making machine elements bolts, studs, or the like with heads
B21K 1/48 Machines working with hammers, e.g. beating in a radial direction, for forming heads
B21K 1/50 Trimming or shearing formed heads, e.g. working with dies
B21K 1/52 Making machine elements bolts, studs, or the like double-ended, e.g. with heads on both ends
B21K 1/54 Making machine elements bolts, studs, or the like with grooves or notches
B21K 1/56 Making machine elements screw-threaded elements
B21K 1/58 Making machine elements rivets
B21K 1/60 Making machine elements rivets hollow or semi-hollow rivets
B21K 1/62 Making machine elements rivets special rivets, e.g. with electrical contacts
B21K 1/64 Making machine elements nuts
B21K 1/66 Making machine elements nuts from strip bars
B21K 1/68 Making machine elements nuts from round or profiled bars
B21K 1/70 Making machine elements nuts of special shape, e.g. self-locking nuts, wing nuts
B21K 1/72 Making machine elements hooks, e.g. crane hooks, railway track spikes
B21K 1/74 Making machine elements forked members or members with two or more limbs, e.g. U-bolts, anchors
B21K 1/76 Making machine elements elements not mentioned in one of the preceding groups
B21K 3/00 Making engine or like machine parts not covered by ; Making propellers or the like
B21K 3/02 Making engine or like machine parts not covered by ; Making propellers or the like cylinder heads
B21K 3/04 Making engine or like machine parts not covered by ; Making propellers or the like blades, e.g. for turbines; Upsetting of blade roots
B21K 5/00 Making tools or tool parts, e.g. pliers
B21K 5/02 Making tools or tool parts, e.g. pliers drilling-tools or other tools for making or working on holes
B21K 5/04 Making tools or tool parts, e.g. pliers drilling-tools or other tools for making or working on holes twisting-tools, e.g. drills, reamers
B21K 5/06 Dressing, e.g. sharpening rock drills
B21K 5/08 Making tools or tool parts, e.g. pliers drilling-tools or other tools for making or working on holes drifting tools
B21K 5/10 Forming drill-bit shanks
B21K 5/12 Making tools or tool parts, e.g. pliers other cutting tools
B21K 5/14 Making tools or tool parts, e.g. pliers hand hammers
B21K 5/16 Making tools or tool parts, e.g. pliers tools for turning nuts
B21K 5/18 Making tools or tool parts, e.g. pliers handles or parts therefor
B21K 5/20 Making working faces of dies, either recessed or outstanding
B21K 7/00 Making railway appurtenances; Making vehicle parts
B21K 7/02 Making railway appurtenances; Making vehicle parts parts for permanent way
B21K 7/04 Making railway appurtenances; Making vehicle parts parts for permanent way switch tongues
B21K 7/06 Making railway appurtenances; Making vehicle parts parts for permanent way sleepers
B21K 7/08 Making railway appurtenances; Making vehicle parts parts for permanent way base plates for rails, e.g. chairs
B21K 7/10 Making railway appurtenances; Making vehicle parts parts for permanent way rail joints
B21K 7/12 Making railway appurtenances; Making vehicle parts parts for locomotives or vehicles, e.g. frames, underframes
B21K 7/14 Making railway appurtenances; Making vehicle parts parts for locomotives or vehicles, e.g. frames, underframes brake rigging or brake parts
B21K 9/00 Reconditioning railroad accessories, e.g. rails
B21K 11/00 Making cutlery wares; Making garden tools or the like
B21K 11/02 Making cutlery wares; Making garden tools or the like knives
B21K 11/04 Making cutlery wares; Making garden tools or the like table forks
B21K 11/06 Making cutlery wares; Making garden tools or the like scissors
B21K 11/08 Making cutlery wares; Making garden tools or the like scythes
B21K 11/10 Making cutlery wares; Making garden tools or the like picks
B21K 11/12 Making cutlery wares; Making garden tools or the like shovels
B21K 11/14 Making cutlery wares; Making garden tools or the like garden forks
B21K 13/00 Making locksmiths' goods, e.g. handles for cases
B21K 13/02 Making locksmiths' goods, e.g. handles for cases hinges
B21K 15/00 Making blacksmiths' goods
B21K 15/02 Making blacksmiths' goods accessories therefor
B21K 15/04 Making blacksmiths' goods accessories therefor caulks
B21K 15/06 Making blacksmiths' goods metal attachments for footwear, e.g. wear-resisting plates
B21K 17/00 Making sport articles, e.g. skates
B21K 19/00 Making articles for agricultural machinery
B21K 19/02 Making articles for agricultural machinery ploughshares
B21K 21/00 Making hollow articles not covered by any single one of groups
B21K 21/02 Producing blanks in the shape of discs or cups as semi-finished articles for making hollow articles, e.g. to be deep-drawn or extruded
B21K 21/04 Shaping thin-walled hollow articles, e.g. cartridges
B21K 21/06 Shaping thick-walled hollow articles, e.g. projectiles
B21K 21/08 Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs
B21K 21/10 Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs cone-shaped or bell-shaped articles, e.g. insulator caps
B21K 21/12 Shaping end portions of hollow articles
B21K 21/14 Shaping end portions of hollow articles closed or substantially-closed ends, e.g. cartridge bottoms
B21K 21/16 Remodelling hollow bodies with respect to the shape of the cross-section
B21K 23/00 Making other articles
B21K 23/02 Making other articles members of endless tracks, e.g. track guides, shoes
B21K 23/04 Making other articles flanged articles
B21K 25/00 Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
B21K 27/00 Handling devices, e.g. for feeding, aligning, discharging; Cutting-off means; Arrangement thereof
B21K 27/02 Feeding devices for rods, wire, or strips
B21K 27/04 Feeding devices for rods, wire, or strips allowing successive working steps
B21K 27/06 Cutting-off means; Arrangement thereof
B21K 29/00 Arrangements for heating or cooling during processing
B21K 31/00 Control devices specially adapted for positioning tool carriers