DIFF Subgroup
G01J 1/02 Details
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Photometry, e.g. photographic exposure meter > Details
CPC:
Photometry, e.g. photographic exposure meter (spectrophotometry G01J3/00; specially adapted for radiation pyrometry G01J5/00 ) > Details
CPC subdivides this area 9x more granularly than IPC with 16 additional codes.
16 codes are CPC-only extensions.
Child Classifications
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- G01J 1/08 Arrangements of light sources specially adapted for photometry +2 CPC IPC+CPC Available in IPC and CPC