| 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} |
| 474 | | .~.~.~ The balance controlling indirectly, i.e., without mechanical connection, contacts, e.g., by magnetic or optic means, etc. [G04C 3/06E] |