Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics

Introduced: September 1968

Additional Content IPC

Indicating arrangements in which characters are formed on a support by combining individual liquid crystal elements Control of light sources , ,

Of 4 combined children, 3 exist in both systems.

1 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1974.

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G02F 1/0009 +8 CPC CPC only CPC only
G02F 1/01 for the control of the intensity, phase, polarisation or colour (G02F1/29, G02F1/35 take precedence) since 1974 +7 CPC IPC+CPC Available in IPC and CPC
G02F 1/29 for the control of the position or the direction of light beams, i.e. deflection since 1974 +4 CPC IPC+CPC Available in IPC and CPC
G02F 1/35 Non-linear optics since 1974 +8 CPC IPC+CPC Available in IPC and CPC

Class G02,2013–2023, worldwide · Source: EPO PATSTAT

Class G02,2013–2023, worldwide · Source: EPO PATSTAT