| 400 / | HD | TYPEWRITING MACHINES |
| 383 | DF | TYPE-BAR-ACTION MECHANISM OR TYPE-FACE ON TYPE-BAR OR TYPE-FACE INKER {19} |
| 422 | DF | .~ Type-bar action {12} |
| 434 | DF | .~.~ Including connecting link or joint {3} |
| 434.3 | ![]() | .~.~.~ Including connecting element (e.g., joint, etc.) |