CPC Subgroup
G04G 9/04 by controlling light sources, e.g. electroluminescent diodes
Full Title
Visual time or date indication means > by selecting desired characters out of a number of characters or by selecting indicating elements the position of which represent the time, e.g. by using multiplexing techniques > by controlling light sources, e.g. electroluminescent diodes
3 direct subcodes
Child Classifications
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