| 29 / | HD | METAL WORKING |
| 592 | DF | METHOD OF MECHANICAL MANUFACTURE {54} |
| 592.1 | DF | .~ Electrical device making {14} |
| 602.1 | DF | .~.~ Electromagnet, transformer or inductor {6} |
| 603.01 | DF | .~.~.~ Magnetic recording reproducing transducer (e.g., tape head, core, etc.) {4} |
| 603.07 | DF | .~.~.~.~ Fabricating head structure or component thereof {7} |
| 603.16 | DF | .~.~.~.~.~ Machining magnetic material (e.g., grinding, etching, polishing) {2} |
| 603.18 | | .~.~.~.~.~.~ By etching |