| 428 / | HD | STOCK MATERIAL OR MISCELLANEOUS ARTICLES |
| 544 | DF | ALL METAL OR WITH ADJACENT METALS {31} |
| 546 | DF | .~ Having metal particles {4} |
| 548 | DF | .~.~ Composite; i.e., plural, adjacent, spatially distinct metal components (e.g., layers, etc.) {5} |
| 553 | DF | .~.~.~ Nonparticulate metal component {5} |
| 557 | | .~.~.~.~ Plural particulate metal components |