DIFF Subgroup
G02B 5/28 Interference filters
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Optical elements other than lenses > Filters > Interference filters
CPC:
Optical elements other than lenses (light guides G02B6/00; optical logic elements G02F3/00) > Filters (polarising elements G02B5/30) > Interference filters
Of 5 combined children, 0 exist in both systems.
5 codes are CPC-only extensions.
Child Classifications
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