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

Introduced: January 1980

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

CPC subdivides this area 3x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

IPC defines codes here since 1980.

Child Classifications

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G04G 9/022 CPC only CPC only
G04G 9/025 CPC only CPC only
G04G 9/027 CPC only CPC only
G04G 9/04 by controlling light sources, e.g. electroluminescent diodes since 1980 +3 CPC IPC+CPC Available in IPC and CPC
G04G 9/06 using light valves, e.g. liquid crystals since 1980 +3 CPC IPC+CPC Available in IPC and CPC