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} |
918 | DF | .~.~ With metallurgical heat treating {1} |
919 | DF | .~.~.~ Reactive formation of superconducting intermetallic compound {2} |
921 | .~.~.~.~ Metal working prior to treating |