G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
Description
G01H covers instruments and methods for measuring mechanical vibrations across the acoustic spectrum, including ultrasonic (>20 kHz), sonic (20 Hz–20 kHz), and infrasonic (<20 Hz) waves. This subclass encompasses accelerometers, vibration sensors, acoustic transducers, and related devices used to detect, quantify, and analyze vibrational phenomena in materials, structures, and media. Typical applications include non-destructive testing, structural health monitoring, condition-based maintenance, and acoustic characterization of mechanical systems. Related measurements of sound intensity, pressure, and frequency are generally classified separately under G01N (analytical testing of materials) or H04R (acoustics in general).
Filing statistics
CPC subclass G01H recorded 33,692 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,342 in 2013 to 3,954 in 2023 (+195%), peaking at 4,268 applications in 2020. The most active applicants in class G01 are CHINESE ACADEMY OF SCIENCES (21,460 applications), ROBERT BOSCH (17,801 applications) and SGCC(STATE GRID CORPORATION OF CHINA) (17,347 applications).
Source: EPO PATSTAT, worldwide filings
9 direct subcodes
Child Classifications
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- G01H 1/00 Measuring vibrations in solids by using direct conduction to the detector (G01H9/00, G01H11/00 take precedence)
- G01H 11/00 Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H 13/00 Measuring resonant frequency
- G01H 15/00 Measuring mechanical or acoustic impedance
- G01H 17/00 Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the other groups of this subclass
- G01H 3/00 Measuring vibrations by using a detector in a fluid (G01H7/00, G01H9/00, G01H11/00 take precedence)
- G01H 5/00 Measuring propagation velocity of ultrasonic, sonic or infrasonic waves
- G01H 7/00 Measuring reverberation time
- G01H 9/00 Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
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