968 / | HD | HOROLOGY |
876 | DD | SUBJECT MATTER NOT PROVIDED FOR IN SUBCLASSES 901 TO 975, E.G., INTEGRATED CIRCUITS FOR ELECTRONIC TIMEPIECES [G04G 1/00] {6} |
888 | DD | .~ Electric power supply circuits (in general H02M 1/00) [G04G 1/00C] {4} |
893 | .~.~ Backup power supply [G04G 1/00C5] |