DIFF Subgroup
G01J 3/50 using electric radiation detectors
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Spectrometry; Spectrophotometry; Monochromators; Measuring colours > Measurement of colour; Colour measuring devices, e.g. colorimeters > using electric radiation detectors
CPC:
Spectrometry; Spectrophotometry; Monochromators; Measuring colours > Measurement of colour; Colour measuring devices, e.g. colorimeters (measuring colour temperature G01J5/60) > using electric radiation detectors
CPC subdivides this area 9x more granularly than IPC with 8 additional codes.
8 codes are CPC-only extensions.
Note: 2 CPC extensions are marked as secondary classification only.
IPC defines codes here since 1985.
Child Classifications
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