CPC Subclass Not Allocatable
G01F MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
Description
This subclass encompasses instruments and methods for quantifying fluid volumes, flow rates, and liquid levels across industrial, scientific, and domestic applications. Coverage includes volumetric flowmeters (turbine, gear, and piston types), mass flowmeters (Coriolis and thermal devices), liquid level indicators (float, capacitive, and ultrasonic), and positive displacement metering pumps. The classification extends to flow measurement principles using differential pressure, electromagnetic, and vortex-shedding techniques, as well as apparatus for calibration and testing of such instruments.
13 direct subcodes
Child Classifications
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- G01F 1/00 Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow (measuring a proportion of the volume flow G01F5/00)
- G01F 11/00 Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F 13/00 Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups
- G01F 15/00 Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F 17/00 Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies (measuring linear dimensions to determine volume G01B)
- G01F 19/00 Calibrated capacity measures for fluids or fluent solid material, e.g. measuring cups
- G01F 22/00 Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
- G01F 23/00 Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F 25/00 Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F 3/00 Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow (measuring a proportion of the volume flow G01F5/00)
- G01F 5/00 Measuring a proportion of the volume flow
- G01F 7/00 Volume-flow measuring devices with two or more measuring ranges; Compound meters
- G01F 9/00 Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
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