Measuring direction or magnitude of magnetic fields or magnetic flux (G01R33/20 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Measuring direction or magnitude of magnetic fields or magnetic flux

CPC: Measuring direction or magnitude of magnetic fields or magnetic flux (G01R33/20 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Arrangements or instruments for measuring magnetic variables > Measuring direction or magnitude of magnetic fields or magnetic flux

CPC:

Arrangements or instruments for measuring magnetic variables > Measuring direction or magnitude of magnetic fields or magnetic flux (G01R33/20 takes precedence)

Additional Content IPC

Measuring direction or magnitude of the earth’s field for navigation or surveying For prospecting, for measuring the magnetic field of the earth

Of 11 combined children, 9 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

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G01R 33/0206 CPC only CPC only
G01R 33/0213 CPC only CPC only
G01R 33/022 Measuring gradient since 1980 IPC+CPC Available in IPC and CPC
G01R 33/025 Compensating stray fields since 1980 IPC+CPC Available in IPC and CPC
G01R 33/028 Electrodynamic magnetometers since 1980 +2 CPC IPC+CPC Available in IPC and CPC
G01R 33/032 using magneto-optic devices, e.g. Faraday since 1980 +3 CPC IPC+CPC Available in IPC and CPC
G01R 33/035 using superconductive devices since 1980 +2 CPC IPC+CPC Available in IPC and CPC
G01R 33/038 using permanent magnets, e.g. balances, torsion devices since 1980 +1 CPC IPC+CPC Available in IPC and CPC
G01R 33/04 using the flux-gate principle +1 CPC IPC+CPC Available in IPC and CPC
G01R 33/06 using galvano-magnetic devices +2 CPC IPC+CPC Available in IPC and CPC
G01R 33/10 Plotting field distribution IPC+CPC Available in IPC and CPC

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