| 968 / | HD | HOROLOGY |
| 809 | DD | APPARATUS WHICH CAN BE SET AND STARTED TO MEASURE OFF PREDETERMINED OR ADJUSTABLY FIXED TIME INTERVALS WITH DRIVING MECHANISMS, E.G., DOSIMETER WITH CLOCKWORK, ETC. (electric time or time-program switches H01H 43/00) [G04F 3/00] {2} |
| 810 | DD | .~ With mechanical driving mechanisms [G04F 3/02] {4} |
| 814 | | .~.~ Additional arrangements in connection with ordinary nonelectric clocks for this purpose [G04F 3/04] |