System and method for predicting and controlling gas line performance
US-2020400530-A1 · Dec 24, 2020 · US
Frequency
Frequency · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01H3/04 |
| Official title | Frequency |
| Display label | Frequency |
| Total patents | 137 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 5 |
| 2017 | 7 |
| 2018 | 16 |
| 2019 | 19 |
| 2020 | 14 |
| 2021 | 23 |
| 2022 | 19 |
| 2023 | 13 |
| 2024 | 8 |
| 2025 | 6 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Structural implementations for optimizing acoustic resonance in a vibration sensor
US-10845237-B2 · Nov 24, 2020 · US
Detecting Downhole Sand Ingress Locations
US-2020200000-A1 · Jun 25, 2020 · US
Vibration sensor with monitoring function and vibration signal monitoring method thereof
US-2020200593-A1 · Jun 25, 2020 · US
Distributed acoustic sensing autocalibration
US-2020190971-A1 · Jun 18, 2020 · US
Analysis support apparatus, analysis support method, and a computer-readable medium containing an analysis support program
US-2020158561-A1 · May 21, 2020 · US
Well and Overburden Monitoring Using Distributed Acoustic Sensors
US-2020048999-A1 · Feb 13, 2020 · US
Ultrasonic bonding apparatus, ultrasonic bonding inspection method and ultrasonically-bonded portion fabrication method
US-2020035642-A1 · Jan 30, 2020 · US
Method and apparatus for rapid acoustic analysis
US-10539655-B1 · Jan 21, 2020 · US
Detecting Downhole Events Using Acoustic Frequency Domain Features
US-2019390546-A1 · Dec 26, 2019 · US
Non-Invasive Pipeline Pig Signal Using Vibration Sensors
US-2019360611-A1 · Nov 28, 2019 · US
Abnormal sound determination apparatus and determination method
US-10475469-B2 · Nov 12, 2019 · US
Ultrasonic apparatus
US-2019339370-A1 · Nov 7, 2019 · US
System and Method of Integrated Vibration Monitoring in Motor Drives
US-2019310130-A1 · Oct 10, 2019 · US
Abnormal sound determination apparatus and determination method
US-2019295568-A1 · Sep 26, 2019 · US
Diagnostic apparatus, image forming apparatus, diagnostic system, computer readable medium, diagnostic method, and computer data signal
US-2019289138-A1 · Sep 19, 2019 · US
Measuring frequency-dependent acoustic attenuation
US-10408052-B2 · Sep 10, 2019 · US
Method and apparatus for diagnosing a fault condition in an electric machine
US-10408879-B2 · Sep 10, 2019 · US
System and method of integrated vibration monitoring in motor drives
US-10378951-B2 · Aug 13, 2019 · US
Intelligent noise monitoring device and noise monitoring method using the same
US-10371567-B2 · Aug 6, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G01H3/04?
- CPC G01H3/04 is the Cooperative Patent Classification code for “Frequency.”
- How many patents are filed under CPC G01H3/04 (Frequency)?
- Our database includes 137 publications tagged with this CPC code.
- Is patent activity under CPC G01H3/04 growing?
- Publication counts under this code: 8 in 2024 vs 6 in 2025 (latest complete years).