G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
Introduced: September 1968
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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.
Filing statistics
IPC subclass G01R 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
In class comparison
G01R ranks 2nd of 18 subclasses with filings in G01, with 598,083 applications between 2013 and 2023, 12.7% of the class. Annual filings grew 120% from 2013 to 2023, below the class as a whole (+138%).
| Rank | Subclass | Title | Applications | Share |
|---|---|---|---|---|
| 1 | G01N, Investigating or Analysing Materials by Determining Their Chemical or Physical Properties | Investigating or Analysing Materials by Determining Their Chemical or Physical Properties | 1,640,918 | 34.9% |
| 2 | G01R | Measuring Electric Variables; Measuring Magnetic Variables | 598,083 | 12.7% |
| 3 | G01B, Measuring Length, Thickness or Similar Linear Dimensions; Measuring Angles; Measuring Areas; Measuring Irregularities of Surfaces or Contours | Measuring Length, Thickness or Similar Linear Dimensions; Measuring Angles; Measuring Areas; Measuring Irregularities of Surfaces or Contours | 395,662 | 8.4% |
| 4 | G01S, Radio Direction-Finding; Radio Navigation; Determining Distance or Velocity by Use of Radio Waves; Locating or Presence-Detecting by Use of the Reflection or Reradiation of Radio Waves; Analogous Arrangements Using Other Waves | Radio Direction-Finding; Radio Navigation; Determining Distance or Velocity by Use of Radio Waves; Locating or Presence-Detecting by Use of the Reflection or Reradiation of Radio Waves; Analogous Arrangements Using Other Waves | 358,214 | 7.6% |
| 5 | G01M, Testing Static or Dynamic Balance of Machines or Structures; Testing of Structures or Apparatus, Not Otherwise Provided for | Testing Static or Dynamic Balance of Machines or Structures; Testing of Structures or Apparatus, Not Otherwise Provided for | 339,843 | 7.2% |
| 6 | G01C, Measuring Distances, Levels or Bearings; Surveying; Navigation; Gyroscopic Instruments; Photogrammetry or Videogrammetry | Measuring Distances, Levels or Bearings; Surveying; Navigation; Gyroscopic Instruments; Photogrammetry or Videogrammetry | 271,474 | 5.8% |
| 7 | G01D, Measuring Not Specially Adapted for a Specific Variable; Arrangements for Measuring Two or More Variables Not Covered by a Single Other Subclass; Tariff Metering Apparatus; Transferring or Transducing Arrangements Not Specially Adapted for a Specific Variable; Measuring or Testing Not Otherwise Provided for | Measuring Not Specially Adapted for a Specific Variable; Arrangements for Measuring Two or More Variables Not Covered by a Single Other Subclass; Tariff Metering Apparatus; Transferring or Transducing Arrangements Not Specially Adapted for a Specific Variable; Measuring or Testing Not Otherwise Provided for | 207,395 | 4.4% |
| 8 | G01F, Measuring Volume, Volume Flow, Mass Flow, or Liquid Level; Metering by Volume | Measuring Volume, Volume Flow, Mass Flow, or Liquid Level; Metering by Volume | 157,084 | 3.3% |
| 9 | G01L, Measuring Force, Stress, Torque, Work, Mechanical Power, Mechanical Efficiency, or Fluid Pressure | Measuring Force, Stress, Torque, Work, Mechanical Power, Mechanical Efficiency, or Fluid Pressure | 145,069 | 3.1% |
| 10 | G01K, Measuring Temperature; Measuring Quantity of Heat; Thermally-Sensitive Elements Not Otherwise Provided for | Measuring Temperature; Measuring Quantity of Heat; Thermally-Sensitive Elements Not Otherwise Provided for | 118,108 | 2.5% |
Source: EPO PATSTAT, worldwide filings
Additional Content
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
Related Keywords
19 direct subcodes
Child Classifications
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- G01R 1/00 Details of instruments or arrangements of the types covered by groups or
- G01R 11/00 Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R 13/00 Arrangements for displaying electric variables or waveforms
- G01R 15/00 Details of measuring arrangements of the types provided for in groups , or
- G01R 17/00 Measuring arrangements involving comparison with a reference value, e.g. bridge
- G01R 19/00 Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R 21/00 Arrangements for measuring electric power or power factor
- G01R 22/00 Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R 23/00 Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R 25/00 Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
- G01R 27/00 Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R 29/00 Arrangements for measuring or indicating electric quantities not covered by groups
- G01R 3/00 Apparatus or processes specially adapted for the manufacture of measuring instruments
- 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
- G01R 33/00 Arrangements or instruments for measuring magnetic variables
- G01R 35/00 Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R 5/00 Instruments for converting a single current or a single voltage into a mechanical displacement
- G01R 7/00 Instruments capable of converting two or more currents or voltages into a single mechanical displacement
- G01R 9/00 Instruments employing mechanical 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