by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques

Introduced: January 1980

Full Title

Visual time or date indication means > by building-up characters using a combination of indicating elements, 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.

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G04G 9/082 CPC only CPC only
G04G 9/085 CPC only CPC only
G04G 9/087 CPC only CPC only
G04G 9/10 by controlling light sources, e.g. electroluminescent diodes since 1980 +3 CPC IPC+CPC Available in IPC and CPC
G04G 9/12 using light valves, e.g. liquid crystals since 1980 +4 CPC IPC+CPC Available in IPC and CPC

Class G04,2013–2023, worldwide · Source: EPO PATSTAT

Class G04,2013–2023, worldwide · Source: EPO PATSTAT