| 505 / | HD | SUPERCONDUCTOR TECHNOLOGY: APPARATUS, MATERIAL, PROCESS |
| 825 | DF | APPARATUS, PER SE, DEVICE, PER SE, OR PROCESS OF MAKING OR OPERATING SAME {36} |
| 917 | DF | .~ Mechanically manufacturing superconductor: (Classes 29, 72, and 228) {8} |
| 928 | | .~.~ Metal deforming {2} |
| 929 | DF | .~.~.~> By extruding |
| 930 | DF | .~.~.~> By drawing |