DIFF Subgroup
G01J 1/56 using radiation pressure or radiometer effect
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Photometry, e.g. photographic exposure meter > using radiation pressure or radiometer effect
CPC:
Photometry, e.g. photographic exposure meter (spectrophotometry G01J3/00; specially adapted for radiation pyrometry G01J5/00 ) > using radiation pressure or radiometer effect
No child classifications to compare. This is a leaf node in both IPC and CPC.