B21J1/00	7	Preparing metal stock {or similar ancillary operations prior, during or post forging, e.g. heating or cooling (pretreatment for rolling B21B1/02, B21B15/0035)}	B21J1/00	B21J1/00		286
B21J1/003	8	{Selecting material}	B21J1/00	B21J1/00		205
B21J1/006	9	{Amorphous metal}	B21J1/00	B21J1/00		44
B21J1/02	8	Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough (modifying the physical properties by deformation C21D7/00, C22F1/00)	B21J1/02	B21J1/02		328
B21J1/025	9	{affecting grain orientation}	B21J1/02	B21J1/02		205
B21J1/04	8	Shaping in the rough solely by forging or pressing	B21J1/04	B21J1/04		584
B21J1/06	8	Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations {(B21J5/063 takes precedence)}	B21J1/06	B21J1/06		2775
B21J3/00	7	Lubricating during forging or pressing (lubricating in general F16N)	B21J3/00	B21J3/00		859
B21J5/00	7	Methods for forging, hammering, or pressing (for working sheet-metal or metal tubes, rods, or profiles B21D; for working wire B21F); Special equipment or accessories therefor	B21J5/00	B21J5/00		1504
B21J5/002	8	{Hybrid process, e.g. forging following casting}	B21J5/00	B21J5/00		3318
B21J5/004	8	{Thixotropic process, i.e. forging at semi-solid state}	B21J5/00	B21J5/00		132
B21J5/006	8	{using ultrasonic waves}	B21J5/00	B21J5/00		45
B21J5/008	8	{Incremental forging}	B21J5/00	B21J5/00		328
B21J5/02	8	Die forging; Trimming by making use of special dies {; Punching during forging}	B21J5/02	B21J5/02		3373
B21J5/022	9	{Open die forging}	B21J5/02	B21J5/02		234
B21J5/025	9	{Closed die forging}	B21J5/02	B21J5/02		721
B21J5/027	9	{Trimming}	B21J5/02	B21J5/02		346
B21J5/04	8	by directly applied fluid pressure or explosive action	B21J5/04	B21J5/04		52
B21J5/06	8	for performing particular operations	B21J5/06	B21J5/06		1259
B21J5/063	9	{Friction heat forging (friction heat riveting B21J15/027)}	B21J5/06	B21J5/06		96
B21J5/066	10	{Flow drilling}	B21J5/06	B21J5/06		206
B21J5/068	9	{Shaving, skiving or scarifying for forming lifted portions, e.g. slices or barbs, on the surface of the material}	B21J5/06	B21J5/06		299
B21J5/08	9	Upsetting	B21J5/08	B21J5/08		2807
B21J5/10	9	Piercing billets (in combination with extrusion B21C23/00)	B21J5/10	B21J5/10		955
B21J5/12	9	Forming profiles on internal or external surfaces (making screw-thread by forging, pressing, or hammering B21K)	B21J5/12	B21J5/12		1583
B21J7/00	7	Hammers; Forging machines with hammers or die jaws acting by impact (hand hammers B25D; electrical features in section H)	B21J7/00	B21J7/00		60
B21J7/02	8	Special design or construction	B21J7/02	B21J7/02		208
B21J7/04	9	Power hammers	B21J7/04	B21J7/04		293
B21J7/06	9	Drop hammers	B21J7/06	B21J7/06		68
B21J7/08	10	with rigidly-guided hammer	B21J7/08	B21J7/08		10
B21J7/10	9	with both drive and hammer connected to a fulcrumed lever, e.g. tail hammers	B21J7/10	B21J7/10		103
B21J7/12	10	the lever being a spring, i.e. spring hammers	B21J7/12	B21J7/12		229
B21J7/14	9	Forging machines working with several hammers	B21J7/14	B21J7/14		688
B21J7/145	10	{the hammers being driven by a rotating annular driving member}	B21J7/14	B21J7/14		136
B21J7/16	10	in rotary arrangements	B21J7/16	B21J7/16		382
B21J7/18	9	Forging machines working with die jaws, e.g. pivoted, movable laterally of the forging or pressing direction, e.g. for swaging	B21J7/18	B21J7/18		179
B21J7/20	8	Drives for hammers; Transmission means therefor	B21J7/20	B21J7/20		40
B21J7/22	9	for power hammers	B21J7/22	B21J7/22		49
B21J7/24	10	operated by steam, air, or other gaseous pressure	B21J7/24	B21J7/24		542
B21J7/26	11	operated by internal combustion	B21J7/26	B21J7/26		73
B21J7/28	10	operated by hydraulic or liquid pressure	B21J7/28	B21J7/28		245
B21J7/30	10	operated by electro-magnets	B21J7/30	B21J7/30		92
B21J7/32	10	operated by rotary drive, e.g. by electric motor	B21J7/32	B21J7/32		198
B21J7/34	10	operating both the hammer and the anvil, so-called counter-tup	B21J7/34	B21J7/34		244
B21J7/36	9	for drop hammers	B21J7/36	B21J7/36		66
B21J7/38	10	driven by steam, air, or other gaseous pressure	B21J7/38	B21J7/38		56
B21J7/40	10	driven by hydraulic or liquid pressure	B21J7/40	B21J7/40		42
B21J7/42	10	operated by rotary drive, e.g. electric motors	B21J7/42	B21J7/42		193
B21J7/44	11	equipped with belts, ropes, cables, chains	B21J7/44	B21J7/44		195
B21J7/46	9	Control devices specially adapted to forging hammers, not restricted to one of the preceding subgroups	B21J7/46	B21J7/46		318
B21J9/00	7	Forging presses	B21J9/00	B21J9/00		122
B21J9/02	8	Special design or construction	B21J9/02	B21J9/02		1369
B21J9/022	9	{multi-stage forging presses (handling devices B21K27/00)}	B21J9/02	B21J9/02		421
B21J9/025	9	{with rolling or wobbling dies}	B21J9/02	B21J9/02		558
B21J9/027	9	{with punches moving along auxiliary lateral directions (B21J13/025 takes precedence)}	B21J9/02	B21J9/02		118
B21J9/04	9	Piercing presses	B21J9/04	B21J9/04		399
B21J9/06	9	Swaging presses; Upsetting presses	B21J9/06	B21J9/06		1264
B21J9/08	10	equipped with devices for heating the work-piece (electric heating elements H05B)	B21J9/08	B21J9/08		501
B21J9/10	8	Drives for forging presses	B21J9/10	B21J9/10		118
B21J9/12	9	operated by hydraulic or liquid pressure	B21J9/12	B21J9/12		893
B21J9/14	10	in conjunction with electric power	B21J9/14	B21J9/14		55
B21J9/16	10	in conjunction with steam or gas power	B21J9/16	B21J9/16		72
B21J9/18	9	operated by making use of gearing mechanisms, e.g. levers, spindles, crankshafts, eccentrics, toggle-levers, rack bars	B21J9/18	B21J9/18		883
B21J9/20	9	Control devices specially adapted to forging presses not restricted to one of the preceding subgroups	B21J9/20	B21J9/20		851
B21J11/00	7	Forging hammers combined with forging presses; Forging machines with provision for hammering and pressing	B21J11/00	B21J11/00		50
B21J13/00	7	Details of machines for forging, pressing, or hammering	B21J13/00	B21J13/00		1843
B21J13/02	8	Dies or mountings therefor	B21J13/02	B21J13/02		4998
B21J13/025	9	{Dies with parts moving along auxiliary lateral directions}	B21J13/02	B21J13/02		436
B21J13/03	9	Die mountings	B21J13/03	B21J13/03		1068
B21J13/04	8	Frames; Guides	B21J13/04	B21J13/04		596
B21J13/06	8	Hammers tups; Anvils; Anvil blocks	B21J13/06	B21J13/06		526
B21J13/08	8	Accessories for handling work or tools	B21J13/08	B21J13/08		1616
B21J13/085	9	{handling of tools}	B21J13/08	B21J13/08		572
B21J13/10	9	Manipulators (in general B25J)	B21J13/10	B21J13/10		1771
B21J13/12	10	Turning means	B21J13/12	B21J13/12		463
B21J13/14	9	Ejecting devices	B21J13/14	B21J13/14		1710
B21J15/00	7	Riveting	B21J15/00	B21J15/00		188
B21J15/02	8	Riveting procedures	B21J15/02	B21J15/02		1078
B21J15/022	9	{Setting rivets by means of swaged-on locking collars, e.g. lockbolts}	B21J15/02	B21J15/02		381
B21J15/025	9	{Setting self-piercing rivets}	B21J15/02	B21J15/02		1110
B21J15/027	9	{Setting rivets by friction heating}	B21J15/02	B21J15/02		170
B21J15/04	9	Riveting hollow rivets mechanically	B21J15/04	B21J15/04		288
B21J15/041	10	{by pushing a drive-pin}	B21J15/04	B21J15/04		106
B21J15/043	10	{by pulling a mandrel}	B21J15/04	B21J15/04		1046
B21J15/045	11	{and swaging locking means, i.e. locking the broken off mandrel head to the hollow rivet}	B21J15/04	B21J15/04		144
B21J15/046	10	{by edge-curling}	B21J15/04	B21J15/04		194
B21J15/048	10	{Setting self-drilling hollow rivets}	B21J15/04	B21J15/04		117
B21J15/06	9	Riveting hollow rivets by means of hydraulic, liquid, or gas pressure {(portable riveters B21J15/105)}	B21J15/06	B21J15/06		49
B21J15/08	9	Riveting by applying heat {, e.g.} to the end parts of the rivets to enable heads to be formed {(B21J15/027 takes precedence)}	B21J15/08	B21J15/08		381
B21J15/10	8	Riveting machines (electric heating elements H05B)	B21J15/10	B21J15/10		1903
B21J15/105	9	{Portable riveters (pliers for riveting B21J15/386)}	B21J15/10	B21J15/10		1032
B21J15/12	9	with tools or tool parts having a movement additional to the feed movement, e.g. spin {(B21J15/027 takes precedence)}	B21J15/12	B21J15/12		605
B21J15/14	9	specially adapted for riveting specific articles, e.g. brake lining machines	B21J15/14	B21J15/14		1160
B21J15/142	10	{Aerospace structures}	B21J15/14	B21J15/14		478
B21J15/145	10	{Turbines}	B21J15/14	B21J15/14		25
B21J15/147	10	{Composite articles}	B21J15/14	B21J15/14		151
B21J15/16	9	Drives for riveting machines; Transmission means therefor	B21J15/16	B21J15/16		293
B21J15/18	10	operated by air pressure or other gas pressure, e.g. explosion pressure	B21J15/18	B21J15/18		603
B21J15/185	11	{by explosion pressure}	B21J15/18	B21J15/18		47
B21J15/20	10	operated by hydraulic or liquid pressure	B21J15/20	B21J15/20		453
B21J15/205	11	{Riveting tools having hand operated pumps for building up the hydraulic pressure}	B21J15/20	B21J15/20		42
B21J15/22	10	operated by both hydraulic or liquid pressure and gas pressure	B21J15/22	B21J15/22		348
B21J15/24	10	operated by electro-magnets	B21J15/24	B21J15/24		157
B21J15/26	10	operated by rotary drive, e.g. by electric motor	B21J15/26	B21J15/26		526
B21J15/28	9	Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups	B21J15/28	B21J15/28		928
B21J15/285	10	{for controlling the rivet upset cycle}	B21J15/28	B21J15/28		283
B21J15/30	9	Particular elements, e.g. supports; Suspension equipment specially adapted for portable riveters	B21J15/30	B21J15/30		736
B21J15/32	10	Devices for inserting or holding rivets in position with or without feeding arrangements	B21J15/32	B21J15/32		2453
B21J15/323	11	{using a carrier strip}	B21J15/32	B21J15/32		168
B21J15/326	11	{Broken-off mandrel collection}	B21J15/32	B21J15/32		241
B21J15/34	11	for installing {multiple-type} tubular rivets	B21J15/34	B21J15/34		114
B21J15/36	9	Rivet sets, i.e. tools for forming heads; Mandrels for expanding parts of hollow rivets	B21J15/36	B21J15/36		904
B21J15/365	10	{Mandrels for expanding parts of hollow rivets}	B21J15/36	B21J15/36		63
B21J15/38	8	Accessories for use in connection with riveting, e.g. pliers for upsetting; Hand tools for riveting	B21J15/38	B21J15/38		1792
B21J15/383	9	{Hand tools for riveting}	B21J15/38	B21J15/38		143
B21J15/386	9	{Pliers for riveting}	B21J15/38	B21J15/38		408
B21J15/40	9	for forming rivet heads	B21J15/40	B21J15/40		57
B21J15/42	9	Special clamping devices for workpieces to be riveted together, e.g. operating through the rivet holes	B21J15/42	B21J15/42		739
B21J15/44	9	Rivet hole positioners	B21J15/44	B21J15/44		237
B21J15/46	9	Positioners for rivets for making tube joints	B21J15/46	B21J15/46		131
B21J15/48	9	Devices for caulking rivets	B21J15/48	B21J15/48		81
B21J15/50	9	Removing or cutting devices for rivets	B21J15/50	B21J15/50		399
B21J17/00	7	Forge furnaces (furnaces for heat treatment C21D9/00; furnaces in general F27)	B21J17/00	B21J17/00		550
B21J17/02	8	electrically heated (electric heating elements H05B)	B21J17/02	B21J17/02		159
B21J19/00	7	Blacksmiths requisites not otherwise provided for	B21J19/00	B21J19/00		40
B21J19/02	8	Hearths; Air supply arrangements specially adapted therefor	B21J19/02	B21J19/02		496
B21J19/025	9	{Tyre heaters}	B21J19/02	B21J19/02		68
B21J19/04	8	Anvils; Associated items	B21J19/04	B21J19/04		59
