IPC Subgroup
G02B 5/2 Filters
Introduced: September 1968
Last revised: January 2006
Full Title
Optical elements other than lenses > Filters
Classification Context
- Section:
- PHYSICS
- Class:
- OPTICS
- Subclass:
- OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
Scope Notes
Limiting references: Polarising elements | Application references: Filters specially adapted for photographic purposes
Related Keywords
(4) optical FILTER(S)
3 direct subcodes
Child Classifications
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