DIFF Subgroup
G02C 7/10 Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Optical parts > Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
CPC:
Optical parts (characterised by the material G02B1/00) > Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
Of 6 combined children, 0 exist in both systems.
6 codes are CPC-only extensions.
Child Classifications
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