MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS

Introduced: September 1968

Description

G01B covers instruments and methods for measuring linear dimensions, including length, thickness, and diameter of objects using mechanical, optical, or electronic principles. It encompasses angle measurement devices (goniometers, protractors), area determination techniques, and surface irregularity assessment tools such as profilometers and roughness gauges. This subclass includes calibrated rulers, calipers, micrometers, dial indicators, laser measurement systems, and coordinate measuring machines used across manufacturing quality control, engineering, and metrology applications. Adjacent classes like G01C address angular measurements in surveying contexts, while G01D covers general electric/electronic measuring instruments.

Additional Content IPC

Glossary

Propagation effects propagation effect are relevant if the outcome of a measurement depends on the actual value of a physical quantity characterising the propagation of the wave, i.e. its wavelength, frequency, velocity, or phase. The mere presence or direction of a wave are not considered a propagation effect or to contribute to a propagation effect. To put it in another way, propagation effects are irrelevant, if the radiation may be looked upon as a beam of radiation whose wave nature can be ignored. Examples of measurements where propagation effects are relevant include e.g. measurements of propagation time, phase difference, phase delay, measurements using the Doppler effect, or interference.

Application references

Measuring human body, see the relevant places, where such exist, e.g. , , Measuring appliances combined with walking-sticks Measuring methods or devices specially adapted for metal-rolling mills Measuring, gauging or adjusting equipment for machines for working metal or other material Measuring or gauging equipment specially adapted for grinding or polishing operations , Combinations of measuring devices with writing-implements Devices for metering predetermined lengths of running material Measuring devices for spinning or twisting machines Measuring devices for determining the length of threads in sewing machines Devices for checking, measuring, recording existing surfacing of roads or like structures, e.g. profilographs Measuring diameter of boreholes or wells Geodetical, nautical or aeronautical measuring, surveying, rangefinding Photogrammetry or videogrammetry Investigating or analysing particle size, investigating or analysing surface area of porous material Radio direction-finding, determining distance or velocity by use of propagation effects, e.g. Doppler effect, propagation time, of radio waves, analogous arrangements using other waves Measuring length or roll diameter of film in cameras or projectors Methods or arrangements for converting the position of a manually-operated writing or tracing member into an electrical signal Measuring elapsed travel of recording medium in recording or playback equipment, sensing diameter of record in autochange gramophones Means structurally associated with electric rotary current collectors for indicating brush wear Indicating consumption of electrodes in arc lamps

Of 12 combined children, 10 exist in both systems.

2 codes are CPC-only extensions.

Note: 2 CPC extensions are marked as secondary classification only.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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G01B 1/00 Measuring instruments characterised by the selection of material therefor IPC+CPC Available in IPC and CPC
G01B 11/00 Measuring arrangements characterised by the use of optical techniques +1 CPC IPC+CPC Available in IPC and CPC
G01B 13/00 Measuring arrangements characterised by the use of fluids IPC+CPC Available in IPC and CPC
G01B 15/00 Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons (characterised by the use of optical techniques G01B9/00, G01B11/00) IPC+CPC Available in IPC and CPC
G01B 17/00 Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations IPC+CPC Available in IPC and CPC
G01B 21/00 Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant since 1980 IPC+CPC Available in IPC and CPC
G01B 2210/00 Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors 2nd only +11 CPC CPC only CPC only
G01B 2290/00 Aspects of interferometers not specifically covered by any group under G01B9/02 2nd only +13 CPC CPC only CPC only
G01B 3/00 Measuring instruments characterised by the use of mechanical techniques +1 CPC IPC+CPC Available in IPC and CPC
G01B 5/00 Measuring arrangements characterised by the use of mechanical techniques +9 CPC IPC+CPC Available in IPC and CPC
G01B 7/00 Measuring arrangements characterised by the use of electric or magnetic techniques +3 CPC IPC+CPC Available in IPC and CPC
G01B 9/00 Measuring instruments characterised by the use of optical techniques 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