G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
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.
19 direct subcodes
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)
- 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)
- G01R 13/00 Arrangements for displaying electric variables or waveforms
- 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
- 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 (G01R5/00 takes precedence; for measuring bioelectric currents or voltages A61B5/24)
- G01R 21/00 Arrangements for measuring electric power or power factor (G01R7/12 takes precedence)
- 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 G01R19/00 - G01R27/00
- 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 ( testing line transmission systems H04B3/46; testing or measuring semiconductors or solid state devices during manufacture )
- 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 (G01R9/00 takes precedence)
- G01R 9/00 Instruments employing mechanical resonance
Top Applicants
Top 10 applicants by patent filingsfor 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