| 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 |  | .~.~ Using electromagnetic coupling between electric power source and balance [G04C 3/06] {5} |
| 471 | DD | .~.~.~> The balance controlling contacts and mechanically driving the gear-train [G04C 3/06B] |
| 472 | DD | .~.~.~> The balance controlling contacts, the gear-train or several gear-trains being driven electromagnetically thereby [G04C 3/06C] |
| 473 | DD | .~.~.~> The balance controlling contacts, the balance driving electromagnet simultaneously driving the gear-train [G04C 3/06D] |
| 474 | DD | .~.~.~> The balance controlling indirectly, i.e., without mechanical connection, contacts, e.g., by magnetic or optic means, etc. [G04C 3/06E] |
| 475 | DD | .~.~.~> The balance controlling gear-train by means of static switches, e.g., transistor circuits, etc. (synchronization of balance subclass 520) [G04C 3/06F] {3} |