| Patents for B21L 7 - Making chains or chain links by cutting single loops or loop-parts from coils, assembling the cut parts and subsequently subjecting same to twisting with or without welding (36) |
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| 02/04/2014 | US8640435 System and method for fabrication of fibers using links of nanotubes |
| 10/09/2013 | CN203228140U Feeding and pressing mechanism for automatic chaining machine |
| 04/25/2012 | CN202199718U 链条自动编结机 Chain automatic knitting machine |
| 01/17/2007 | CN1895812A Chain braider |
| 12/05/2006 | US7143571 Method of forming chain links |
| 02/07/2006 | US6993896 Method of forming chain links |
| 12/08/2005 | US20050268592 Method of forming chain links |
| 09/20/2005 | US6945028 Method of forming chain links |
| 07/19/2005 | US6918242 Method of forming chain links |
| 06/14/2005 | US6904746 Method of forming chain links |
| 04/22/2004 | US20040074221 Method of forming chain links |
| 06/19/2003 | US20030110756 Method of forming chain links |
| 11/26/2002 | US6484488 Method of forming chain links |
| 08/08/2002 | US20020104307 Method of forming chain links |
| 07/25/2002 | US20020095930 Method of forming chain links |
| 05/21/2002 | US6389790 Chain link, a jewelry chain and a method of forming the same by contouring |
| 05/16/2002 | US20020056267 Method of forming chain links |
| 01/27/1999 | EP0774086B1 Chain link, connecting part for chain links and method for the production thereof |
| 07/07/1998 | US5775088 Jewelry rope chain cutting tool |
| 06/02/1998 | US5759309 Thermal process for selectively hardening track chain links |
| 06/10/1997 | US5636506 Chain link |
| 05/21/1997 | EP0774086A1 Chain link, connecting part for chain links and method for the production thereof |
| 07/02/1996 | US5531065 Fine jewelry diamond cut rope chain and method of manufacture thereof |
| 06/09/1994 | WO1994012807A1 Chain link, connecting part for chain links and method for the production thereof |
| 06/09/1994 | CA2149748A1 Chain link, connecting part for chain links and method for the production thereof |
| 04/19/1994 | US5303540 Fine jewelry diamond cut rope chain and method of manufacturing same |
| 10/06/1992 | US5152133 Method and machine for the automatic formation of ornamental chains with eight-shaped links |
| 03/03/1992 | US5092120 Method and machine for the formation of ornamental chains with cylindrical helix shaped links |
| 01/16/1991 | EP0408520A2 Method and machine for the automatic manufacture of ornamental chains with 8-shaped chain links |
| 11/27/1990 | US4972670 Process for the automatic production of ornamental link chains |
| 08/01/1990 | EP0380452A2 Method and apparatus for making ornamental chains with cylindrical helix links |
| 10/10/1989 | US4872305 Process for the automatic production of ornamental link chains and relative apparatus |
| 01/15/1985 | US4493183 Machine for the manufacture of chains, in particular of the type known as rope chain in the goldsmithery industry |
| 06/30/1981 | US4275555 Machine and a method for constructing a chain having automatically shaped and welded chain links |
| 06/24/1980 | CA1079988A1 Machine and method for constructing a chain having automatically shaped and welded chain links |
| 08/08/1978 | US4104870 Link-making machine and method |