| 346 / | HD | RECORDERS |
|
| 45 | DF | PLURAL-FUNCTION RECORDER, DISTINGUISHABLE RECORDINGS {4} |
| 49 | DF | .~ Plural markers and single record receiver {1} |
| 50 |  | .~.~ With dotting, printing, or punching marker {5} |
| 51 | DF | .~.~.~> Plural selective, mechanical, manually operated, marker control devices on recorder |
| 52 | DF | .~.~.~> Markers under selective control of element normally discrete from recorder {3} |
| 56 | DF | .~.~.~> With discrete element as marker {2} |
| 59 | DF | .~.~.~> With clock time index-and-dial or character recorder {1} |
| 61 | DF | .~.~.~> With register character recorder |