Electric circuits

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

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

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) > Electric circuits

CPC subdivides this area 5x more granularly than IPC with 4 additional codes.

4 codes are CPC-only extensions.

Note: 4 CPC extensions are marked as secondary classification only.

Child Classifications

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G01J 1/46 using a capacitor IPC+CPC Available in IPC and CPC
G01J 2001/4406 2nd only CPC only CPC only
G01J 2001/4413 2nd only +3 CPC CPC only CPC only
G01J 2001/444 2nd only CPC only CPC only
G01J 2001/4446 2nd only +6 CPC CPC only CPC only