| 968 / | HD | HOROLOGY |
| 925 | DD | VISUAL TIME- OR DATE-INDICATION MEANS [G04G 9/00] {9} |
| 939 | DD | .~ By building up characters using a combination of indicating elements and by selecting desired characters out of a number of characters or by selecting indicating elements the positions of which represent the time (this subclass is a combination of subclasses 942 and 954) [G04G 9/00H] {2} |
| 941 | | .~.~ Using light valves, e.g., liquid crystals, etc. [G04G 9/00H3] |