using electric radiation detectors (optical or mechanical part G01J1/04; by comparison with a reference light or electric value G01J1/10)

Introduced: September 1968

Title

Titles differ between systems:

IPC: using electric radiation detectors

CPC: using electric radiation detectors (optical or mechanical part G01J1/04; by comparison with a reference light or electric value G01J1/10)

Full Title

Full titles differ between systems:

IPC:

Photometry, e.g. photographic exposure meter > using electric radiation detectors

CPC:

Photometry, e.g. photographic exposure meter (spectrophotometry G01J3/00; specially adapted for radiation pyrometry G01J5/00 ) > using electric radiation detectors (optical or mechanical part G01J1/04; by comparison with a reference light or electric value G01J1/10)

CPC subdivides this area 11x more granularly than IPC with 10 additional codes.

10 codes are CPC-only extensions.

Note: 5 CPC extensions are marked as secondary classification only.

Child Classifications

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G01J 1/4204 CPC only CPC only
G01J 1/4209 +3 CPC CPC only CPC only
G01J 1/4228 +1 CPC CPC only CPC only
G01J 1/4257 +1 CPC CPC only CPC only
G01J 1/429 CPC only CPC only
G01J 1/44 Electric circuits +4 CPC IPC+CPC Available in IPC and CPC
G01J 2001/4238 2nd only CPC only CPC only
G01J 2001/4242 2nd only CPC only CPC only
G01J 2001/4247 2nd only +1 CPC CPC only CPC only
G01J 2001/4266 2nd only +4 CPC CPC only CPC only
G01J 2001/4295 2nd only CPC only CPC only