| 968 / | HD | HOROLOGY |
|
| 748 |  | MEASURING, COUNTING, CALIBRATING, TESTING, OR REGULATING APPARATUS (measuring devices and calibers in general G01B; counters in general H03K) [G04D 7/00] {11} |
| 749 | DD | .~> Purely mechanical measuring and testing apparatus [G04D 7/00B] |
| 750 | DD | .~> Electrical measuring and testing apparatus [G04D 7/00C] {1} |
| 752 | DD | .~> Optical measuring and testing apparatus [G04D 7/00D] |
| 753 | DD | .~> Counters for small components, e.g., bearing jewels, etc. [G04D 7/00G] |
| 754 | DD | .~> Testing apparatus for complete clockworks with regard to external influences or general good working [G04D 7/00K] {3} |
| 758 | DD | .~> For mainsprings [G04D 7/02] |
| 759 | DD | .~> For gearwork, e.g., optical control of gear wheels, etc. (optical control in general G01B, G01B 9/08) [G04D 7/04] |
| 760 | DD | .~> For escapements [G04D 7/06] |
| 761 | DD | .~> For balance wheels [G04D 7/08] {2} |
| 768 | DD | .~> For hairsprings of balances [G04D 7/10] |
| 769 | DD | .~> Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard (supporting devices for clocks with built-in recording apparatus subclass 681; measuring short time intervals subclass 844; frequency measuring in general H04B, G01R) [G04D 7/12] {2} |