| 400 / | HD | TYPEWRITING MACHINES |
| 118.2 | DF | TYPING BY OTHER THAN TYPE-FACE OR TYPE-DIE {3} |
| 124.01 | DF | .~ Character formation by impact (e.g., wire matrix) {4} |
| 124.11 | DF | .~.~ Printhead {6} |
| 124.14 | DF | .~.~.~ With actuator {3} |
| 124.17 | DF | .~.~.~.~ Actuator having electromagnet {3} |
| 124.18 | ![]() | .~.~.~.~.~ Electrical component {2} |
| 124.19 | DF | .~.~.~.~.~.~> Moving coil |
| 124.2 | DF | .~.~.~.~.~.~> Permanent magnet |