| 1/00 | Making chains or chain links by bending workpieces of rod, wire, or strip to form links of oval or other simple shape (B21L 3/00, B21L 7/00 take precedence) |
| 1/02 | Making chains or chain links by bending workpieces of rod, wire, or strip to form links of oval or other simple shape (B21L 3/00, B21L 7/00 take precedence) by bending the ends of the workpieces to abut |
| 1/04 | Making chains or chain links by bending workpieces of rod, wire, or strip to form links of oval or other simple shape (B21L 3/00, B21L 7/00 take precedence) by bending and interconnecting the ends of the workpieces with or without separate jointing members |
| 3/00 | Making chains or chain links by bending the chain links or link parts and subsequently welding or soldering the abutting ends (B21L 7/00 takes precedence) |
| 3/02 | Making chains or chain links by bending the chain links or link parts and subsequently welding or soldering the abutting ends (B21L 7/00 takes precedence) Machines or devices for welding chain links |
| 3/04 | Making chains or chain links by bending the chain links or link parts and subsequently welding or soldering the abutting ends (B21L 7/00 takes precedence) Machines or devices for welding chain links by making use of forge or pressure welding |
| 5/00 | Making chains or chain links by working the starting material in such a way that integral, i.e. jointless, chain links are formed |
| 5/02 | Making chains or chain links by working the starting material in such a way that integral, i.e. jointless, chain links are formed in such a way that interconnected links are formed |
| 7/00 | 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 |
| 9/00 | Making chains or chain links, the links being composed of two or more different parts, e.g. drive chains (B21L 1/04, B21L 7/00, B21L 11/14, B21L 13/00 take precedence) |
| 9/02 | Making chains or chain links, the links being composed of two or more different parts, e.g. drive chains (B21L 1/04, B21L 7/00, B21L 11/14, B21L 13/00 take precedence) of roller-chain or other plate-link type |
| 9/04 | Making chains or chain links, the links being composed of two or more different parts, e.g. drive chains (B21L 1/04, B21L 7/00, B21L 11/14, B21L 13/00 take precedence) of roller-chain or other plate-link type Punching or bending the different parts of the chain links |
| 9/06 | Making chains or chain links, the links being composed of two or more different parts, e.g. drive chains (B21L 1/04, B21L 7/00, B21L 11/14, B21L 13/00 take precedence) of roller-chain or other plate-link type Sorting, feeding, assembling, riveting, or finishing parts of chains |
| 9/08 | Making chains or chain links, the links being composed of two or more different parts, e.g. drive chains (B21L 1/04, B21L 7/00, B21L 11/14, B21L 13/00 take precedence) of roller-chain or other plate-link type Combining the chain links with auxiliary parts, e.g. welding-on wear-resistant parts |
| 11/00 | Making chains or chain links of special shape |
| 11/02 | Making chains or chain links of special shape each link being formed of a single member of which both ends are bent or shaped to engage the middle portion of the next link |
| 11/04 | Making chains or chain links of special shape each link being formed of a single member of which both ends are bent or shaped to engage the middle portion of the next link the ends being pierced or punched to form eyes |
| 11/06 | Making chains or chain links of special shape each link being formed of a single member of which both ends are bent or shaped to engage the middle portion of the next link the ends being pierced or punched to form eyes the workpiece being of thin strip metal |
| 11/08 | Making chains or chain links of special shape each link being formed of a single member of which both ends are bent or shaped to engage the middle portion of the next link the ends being interengaged with other parts of the same link |
| 11/10 | Making chains or chain links of special shape the chain links having opposed correspondingly shaped cylindrical and hook-like parts of which one part forms a hinge-like support for the adjacent link (B21L 11/02 takes precedence) |