505 / | HD | SUPERCONDUCTOR TECHNOLOGY: APPARATUS, MATERIAL, PROCESS |
800 | MATERIAL, PER SE, PROCESS OF MAKING SAME {4} | |
801 | DF | .~> Composition: (Classes 75, 252, 501) {7} |
810 | DF | .~> Compound: (Class 423) {1} |
812 | DF | .~> Stock: (Class 428, 428/930) {2} |
815 | DF | .~> Process of making, per se {5} |