DIFF Subgroup
G02B 5/30 Polarising elements (light-modulating devices with active elements G02F1/00)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Polarising elements
CPC: Polarising elements (light-modulating devices with active elements G02F1/00)
Full Title
Full titles differ between systems:
IPC:
Optical elements other than lenses > Polarising elements
CPC:
Optical elements other than lenses (light guides G02B6/00; optical logic elements G02F3/00) > Polarising elements (light-modulating devices with active elements G02F1/00)
Of 4 combined children, 0 exist in both systems.
4 codes are CPC-only extensions.
Child Classifications
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