DIFF Subgroup
G01J 1/12 using wholly visual means (G01J1/20 takes precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: using wholly visual means
CPC: using wholly visual means (G01J1/20 takes precedence)
Full Title
Full titles differ between systems:
IPC:
Photometry, e.g. photographic exposure meter > by comparison with reference light or electric value > using wholly visual means
CPC:
Photometry, e.g. photographic exposure meter (spectrophotometry G01J3/00; specially adapted for radiation pyrometry G01J5/00 ) > by comparison with reference light or electric value > using wholly visual means (G01J1/20 takes precedence)
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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