| 968 / | HD | HOROLOGY |
| 446 | DD | ELECTROMECHANICAL CLOCKS OR WATCHES INDEPENDENT OF OTHER TIMEPIECES AND IN WHICH THE MOVEMENT IS MAINTAINED BY ELECTRIC MEANS (synchronization subclass 506) [G04C 3/00] {8} |
| 466 | DD | .~ Wherein movement is regulated by a balance (construction thereof subclass 110) [G04C 3/04] {2} |
| 470 | DD | .~.~ Using electromagnetic coupling between electric power source and balance [G04C 3/06] {5} |
| 475 | | .~.~.~ The balance controlling gear-train by means of static switches, e.g., transistor circuits, etc. (synchronization of balance subclass 520) [G04C 3/06F] {3} |
| 476 | DD | .~.~.~.~> Constructional details, e.g., disposition of coils, etc. [G04C 3/06F2] |
| 477 | DD | .~.~.~.~> Driving circuits with distinct detecting and driving coils [G04C 3/06F3] {1} |
| 479 | DD | .~.~.~.~> Driving circuits using a single coil for detection and driving purposes [G04C 3/06F4] |