| Patents for B21F 3 - Coiling wire into particular forms (1,688) |
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| 12/17/1998 | DE19825970A1 Spring production system forming spiral or coil springs |
| 12/10/1998 | DE19724125A1 Helical spring winding arrangement onto a rod, especially a radio antenna rod |
| 11/24/1998 | US5839312 Spring manufacturing apparatus |
| 11/03/1998 | US5829293 Automatic spring formation apparatus |
| 10/21/1998 | EP0872293A2 Machine for bending of pipes and bars |
| 10/06/1998 | US5816091 Wire shaping apparatus, in particular universal spring winding machine, with cutting device |
| 08/11/1998 | US5791184 Spring-making machine |
| 06/23/1998 | US5770991 Inductor winding with conductive ribbon |
| 06/09/1998 | US5761943 Method of and arrangement for making helical springs from biconical wire |
| 05/27/1998 | EP0796158B1 Method and device for the optimized production of helical springs on automatic spring-winding machines |
| 05/27/1998 | CN1182945A Method for achieving windings in radial layers |
| 05/20/1998 | EP0842720A2 Method for the manufacture of a coil spring |
| 05/20/1998 | CN2282089Y Forming machine for flexible driving shaft |
| 04/29/1998 | EP0703761A4 Stent |
| 04/22/1998 | CN2279227Y Bulb pin dustproof hood rectangle section steel-wire jump ring spring bending machine |
| 04/15/1998 | EP0836205A1 Winding method of turns in radial layers |
| 04/08/1998 | CA2217544A1 Method for achieving windings in radial layers |
| 03/24/1998 | US5730017 Cutter holder |
| 02/26/1998 | DE19736478A1 Coiling head and controller for manufacturing springs |
| 02/26/1998 | DE19736468A1 Coil-spring winding production machine |
| 02/03/1998 | US5713115 Electronically regulated apparatus for coiling springs |
| 01/28/1998 | CN1171309A Method and apparatus for linear spring |
| 01/21/1998 | EP0819484A1 Method and apparatus for producing linear springs |
| 01/13/1998 | US5706687 Spring coiling machine |
| 11/05/1997 | EP0804978A1 Twisting or bending machine for making either mono or double winding coil springs |
| 11/05/1997 | EP0398874B1 Corneal curvature adjustment ring |
| 10/01/1997 | EP0798058A2 Wire forming apparatus, in particular a universal spring coiling machine with cutting device |
| 09/24/1997 | EP0796158A1 Method and device for the optimized production of helical springs on automatic spring-winding machines |
| 08/26/1997 | US5660067 Versatile spring making machine |
| 08/19/1997 | US5657657 Spring coiling machine with hybrid servo motor-cam torsion control |
| 07/30/1997 | EP0750537A4 Apparatus for manufacturing mattresses and box springs |
| 07/15/1997 | US5647240 Pitch tool holder |
| 05/28/1997 | DE19604408C1 Spring screw manufacturing method |
| 05/27/1997 | US5632086 Jewelry wire bender |
| 05/22/1997 | DE19542895A1 Wire and band drawing=in unit, especially for spring winding and coiling machines |
| 04/15/1997 | US5620170 Coil spring supporting device |
| 03/20/1997 | DE19534189A1 Spring winding device with reproducible parameters and narrow tolerances |
| 03/13/1997 | DE19533562A1 Versatile machine for manufacture of springs |
| 02/12/1997 | CN2247094Y Square section steel wire coil winding machine |
| 01/07/1997 | US5590848 In a rolling mill |
| 01/03/1997 | WO1997000146A1 Spring coiling |
| 01/02/1997 | EP0750537A1 Apparatus for manufacturing mattresses and box springs |
| 12/05/1996 | WO1996038240A1 Methods and means for forming spring coils |
| 11/13/1996 | EP0742061A1 Electronically controlled winding device for mattresses or upholstery springs |
| 10/24/1996 | DE19528294C1 Mfg process for helical pressure spring prodn |
| 10/24/1996 | DE19514486A1 Mfr. of helical springs by automatic spring winding machine |
| 08/29/1996 | DE19506422A1 Coaxial coil spring arrangement |
| 06/13/1996 | WO1996017701A1 Method and device for the optimized production of helical springs on automatic spring-winding machines |
| 06/13/1996 | DE4443503A1 Mfr. of helical springs by automatic spring winding machine |
| 05/30/1996 | DE4440729A1 High strength, relaxation-resistant steel spring |
| 05/22/1996 | CN2227633Y Arc tooth flat connecting ring for mining ring chain |
| 04/10/1996 | CN1119970A High speed laying head |
| 04/09/1996 | US5505722 Corneal curvature adjusting ring |
| 04/03/1996 | EP0703761A1 Stent |
| 02/21/1996 | CN2220329Y Polygon continous hoop reinforcing bar forming machine |
| 01/11/1996 | DE4447253A1 Spiral spring mfg device |
| 01/09/1996 | US5481792 Inductor winding method |
| 12/26/1995 | US5477715 Adaptive spring winding device and method |
| 12/13/1995 | CN2214854Y Hydraulic forming machine for rectangular hooped reinforcement |
| 11/23/1995 | DE4417524A1 Process for manufacturing and assembling wire turbulators for heat exchanger tubes |
| 11/22/1995 | EP0682997A1 Wire transport assembly for bending and winding machines |
| 11/02/1995 | EP0679453A1 High speed laying head |
| 09/26/1995 | US5452598 Automatic spring formation apparatus |
| 09/21/1995 | WO1995024987A1 Apparatus for manufacturing mattresses and box springs |
| 09/06/1995 | CN1107760A Wire rope which is hard to twist |
| 08/29/1995 | US5444905 Apparatus for manufacturing mattresses and box springs |
| 08/29/1995 | US5444903 Method of making a loop for hanging jewelry |
| 08/22/1995 | US5442945 Method of and device for manufacturing curved helical springs |
| 08/22/1995 | US5442944 Auto-feed control mechanism for computerized numerically-controlled spring forming machine |
| 07/05/1995 | CN1029205C Shaping apparatus for polygon screwed hoop |
| 07/05/1995 | CN1029198C Corneal curvature adjustment ring |
| 07/05/1995 | CN1029197C Holder for inserting corneal curvature adjustment ring |
| 05/17/1995 | EP0417276B1 Apparatus for manufacturing combined springs |
| 03/08/1995 | EP0641952A1 Coil spring supporting device |
| 03/01/1995 | CN1099320A Steel wire for automatic coiling and production process thereof |
| 01/18/1995 | EP0572546A4 System and method for joining plastic materials. |
| 12/28/1994 | EP0630297A1 Method and mechanism for the production of upwinding spiral wire products |
| 12/06/1994 | CA1333355C Method and apparatus for forming a barrel coil spring |
| 11/15/1994 | US5363681 Apparatus for shaping wire |
| 10/04/1994 | US5352871 System and method for joining plastic materials |
| 09/23/1994 | CA2092100A1 Wound-wire casing process and machine |
| 09/15/1994 | WO1994020044A1 Stent |
| 08/03/1994 | EP0608466A1 Steel wire for automatic coiling and production process thereof |
| 06/29/1994 | CN2170168Y Machine for arranging and making T-shaped nails |
| 06/21/1994 | US5321965 Inductor winding apparatus and method |
| 05/17/1994 | US5312424 Conreal curvature adjustment ring |
| 05/17/1994 | US5312065 Rod laying head with front and tail end ring control |
| 04/12/1994 | US5301529 Coil winding method and apparatus |
| 03/29/1994 | US5297412 Wire working tool and holder |
| 03/02/1994 | EP0584474A1 Process and apparatus for manufacturing curved helical springs |
| 03/02/1994 | EP0584468A1 Process and apparatus for manufacturing curved helical springs |
| 02/22/1994 | CA1327120C Apparatus for manufacturing spring unit |
| 02/15/1994 | US5285669 Spring manufacturing apparatus and spring cutting mechanism |
| 01/26/1994 | CN1081125A Rod laying head with front and tail end ring control |
| 01/11/1994 | US5277046 Coil winding method and apparatus for dampening vibrations |
| 01/05/1994 | DE4220892A1 Automatic winder for cylindrical coil springs with two grooved rollers - has one roller shaft with limited swivel, while another one carries multi-profile bush |
| 12/29/1993 | CN2150942Y Automatic make-up machine for nuts |
| 12/16/1993 | DE4229294C1 Wire-shaping machine esp. for mfr. of springs - has wire-clamping rollers turning in either direction together round the wire guide axis and intermittently and programme-controlled |
| 12/14/1993 | US5269165 Apparatus for making coiled springs |
| 12/09/1993 | WO1993024254A1 Method and mechanism for the production of upwinding spiral wire products |