400 / | HD | TYPEWRITING MACHINES |
383 | DF | TYPE-BAR-ACTION MECHANISM OR TYPE-FACE ON TYPE-BAR OR TYPE-FACE INKER {19} |
456 | DF | .~ Type-bar or type-member guide structure {5} |
460 | .~.~ Guide adjacent print-point {2} | |
460.1 | DF | .~.~.~> Including rollers or balls |
460.2 | DF | .~.~.~> Including pin or collar |