involving magnetic resonance

Introduced: January 1985

Last revised: January 2006

Full Title

Arrangements or instruments for measuring magnetic variables > involving magnetic resonance

Classification Context

Section:: PHYSICS
Class:: MEASURING; TESTING
Subclass:: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES

Filing statistics

IPC G01R 33/2 belongs to the parent subclass G01R, which recorded 598,083 patent applications worldwide between 2013 and 2023. Annual filings grew from 34,721 in 2013 to 76,517 in 2023 (+120%). The most active applicants in class G01 are SGCC(STATE GRID CORPORATION OF CHINA) (41,447 applications), CHINESE ACADEMY OF SCIENCES (32,952 applications) and ROBERT BOSCH (16,470 applications).

Source: EPO PATSTAT, worldwide filings

Related Keywords

COMPUTER(S) tomographsNUCLEAR magnetic resonancenuclear magnetic RESONANCE

6 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

G01R 33/24 for measuring direction or magnitude of magnetic fields or magnetic flux
G01R 33/28 Details of apparatus provided for in groups
G01R 33/44 using nuclear magnetic resonance [NMR]
G01R 33/6 using electron paramagnetic resonance
G01R 33/62 using double resonance
G01R 33/64 using cyclotron resonance

Top Applicants

Top 10 applicants by patent filingsfor 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