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

Top Applicants

Top Applicants (IPC)

Class G01,2013–2023, worldwide · Source: EPO PATSTAT

SGCC(STATE GRID CORPORATION OF CHINA) 41,447
CHINESE ACADEMY OF SCIENCES 32,952
ROBERT BOSCH DE 16,470
SAMSUNG ELECTRONICS COMPANY KR 10,052
SINOPEC (CHINA PETROCHEMICAL CORPORATION) 9,573
ZHEJIANG UNIVERSITY 9,529
GUANGDONG POWER GRID CORPORATION 8,615
TSINGHUA UNIVERSITY 7,805
HALLIBURTON ENERGY SERVICES GROUP US 7,796
QUALCOMM US 7,171

Top Applicants (CPC)

Class G01,2013–2023, worldwide · Source: EPO PATSTAT

CHINESE ACADEMY OF SCIENCES 21,460
ROBERT BOSCH DE 17,801
SGCC(STATE GRID CORPORATION OF CHINA) 17,347
SAMSUNG ELECTRONICS COMPANY KR 13,192
QUALCOMM US 9,900
HALLIBURTON ENERGY SERVICES GROUP US 9,742
PHILIPS ELECTRONICS NL 7,249
MITSUBISHI ELECTRIC CORPORATION JP 6,503
ZHEJIANG UNIVERSITY 6,414
DENSO CORPORATION JP 6,382