G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
Introduced: September 1968
Description
G01R covers instruments and methods for measuring electrical quantities (voltage, current, resistance, power, energy, frequency, phase) and magnetic properties (magnetic field strength, flux density, permeability). This subclass encompasses analog and digital measuring devices, meters, oscilloscopes, multimeters, and associated test equipment used in electrical installations, power systems, and electronic circuits. The classification includes both direct measurement techniques and indirect determination of electrical parameters through calculation or conversion. Adjacent classes G01P (velocity/acceleration measurement) and G01N (materials testing) address mechanical motion and material properties respectively, while G01R focuses exclusively on electromagnetic variables.
Title
Titles differ between systems:
IPC: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
CPC: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
Full Title
Full titles differ between systems:
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
Additional Content IPC
Glossary
measuring properties measuring property can also be interpreted as investigating properties. instruments measuring instruments instrument measuring instrument means electro-mechanical measuring mechanisms. arrangements for measuring arrangement for measuring means apparatus, circuits or methods for measuring.
Limiting references
Indicating correct tuning of resonant circuits Measuring electric variables or properties . Medical diagnosis by electric means, e.g. by measuring bioelectric currents or voltages, or the impedance of a part of the body , , Monitoring electric consumption of electrically-propelled vehicles Investigating non-electric or non-magnetic properties of materials by the use of electric means Electric prospecting or detecting Measuring atmospheric potential differences, e.g. due to electrical charges in clouds Measuring magnetic variables or properties . Medical diagnosis by means of magnetic fields, e.g. involving ESR, NMR or MRI , Ascertaining earth’s true or magnetic north for navigation or surveying purposes Magnetic resonance gyrometers Investigating or analysing materials by using NMR, EPR (i.e. ESR) or other spin effects Investigating non-electric or non-magnetic properties of materials by the use of magnetic means Measuring direction or magnitude of the magnetic earth’s field; Magnetic prospecting or detecting, e.g. well logging involving NMR Electric testing of control systems Testing computers during standby operation or idle time Testing of switches in structural association with the switches themselves Testing discharge tubes during manufacture Accumulators with integrated arrangements for testing condition Testing of A/D or D/A conversion Testing line transmission systems Testing arrangements of data switching networks Testing arrangements of telephone substation equipments Testing of television systems or details thereof Testing arrangements of loudspeakers, microphones or similar electromechanical transducers Testing lamps structurally associated with light source circuit arrangements for detecting lamp failure , Testing or measuring semiconductors or solid-state devices during manufacture or treatment
IPC and CPC are identically structured here. All 19 subcodes exist in both systems.
8 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G01R 1/00 Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00 (constructional details particular to arrangements for measuring the electric consumption G01R11/02) IPC+CPC Available in IPC and CPC
- G01R 11/00 Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption (monitoring electric consumption of electrically-propelled vehicles B60L3/00) IPC+CPC Available in IPC and CPC
- G01R 13/00 Arrangements for displaying electric variables or waveforms IPC+CPC Available in IPC and CPC
- G01R 15/00 Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00 +2 CPC IPC+CPC Available in IPC and CPC
- G01R 17/00 Measuring arrangements involving comparison with a reference value, e.g. bridge IPC+CPC Available in IPC and CPC
- G01R 19/00 Arrangements for measuring currents or voltages or for indicating presence or sign thereof (G01R5/00 takes precedence; for measuring bioelectric currents or voltages A61B5/24) +7 CPC IPC+CPC Available in IPC and CPC
- G01R 21/00 Arrangements for measuring electric power or power factor (G01R7/12 takes precedence) +3 CPC IPC+CPC Available in IPC and CPC
- G01R 22/00 Arrangements for measuring time integral of electric power or current, e.g. electricity meters since 1985 IPC+CPC Available in IPC and CPC
- G01R 23/00 Arrangements for measuring frequencies; Arrangements for analysing frequency spectra +1 CPC IPC+CPC Available in IPC and CPC
- G01R 25/00 Arrangements for measuring phase angle between a voltage and a current or between voltages or currents +1 CPC IPC+CPC Available in IPC and CPC
- G01R 27/00 Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom IPC+CPC Available in IPC and CPC
- G01R 29/00 Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00 IPC+CPC Available in IPC and CPC
- G01R 3/00 Apparatus or processes specially adapted for the manufacture of measuring instruments IPC+CPC Available in IPC and CPC
- G01R 31/00 Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere ( testing line transmission systems H04B3/46; testing or measuring semiconductors or solid state devices during manufacture ) +3 CPC IPC+CPC Available in IPC and CPC
- G01R 33/00 Arrangements or instruments for measuring magnetic variables +11 CPC IPC+CPC Available in IPC and CPC
- G01R 35/00 Testing or calibrating of apparatus covered by the other groups of this subclass +2 CPC IPC+CPC Available in IPC and CPC
- G01R 5/00 Instruments for converting a single current or a single voltage into a mechanical displacement IPC+CPC Available in IPC and CPC
- G01R 7/00 Instruments capable of converting two or more currents or voltages into a single mechanical displacement (G01R9/00 takes precedence) 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