DIFF Subgroup
G03F 3/10 Checking the colour or tonal value of separation negatives or positives
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Colour separation; Correction of tonal value > Checking the colour or tonal value of separation negatives or positives
CPC:
Colour separation; Correction of tonal value (photographic copying apparatus in general G03B) > Checking the colour or tonal value of separation negatives or positives
Of 7 combined children, 0 exist in both systems.
7 codes are CPC-only extensions.
Child Classifications
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