Calibration circuit and associated signal processing circuit and chip
US-2020378813-A1 · Dec 3, 2020 · US
Compensating or correcting for variations in velocity of sound
Compensating or correcting for variations in velocity of sound · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01F1/668 |
| Official title | {Compensating or correcting for variations in velocity of sound} |
| Display label | Compensating or correcting for variations in velocity of sound |
| Total patents | 185 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 10 |
| 2017 | 9 |
| 2018 | 13 |
| 2019 | 14 |
| 2020 | 19 |
| 2021 | 18 |
| 2022 | 25 |
| 2023 | 27 |
| 2024 | 21 |
| 2025 | 17 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Measuring instrument and processing apparatus
US-10809105-B2 · Oct 20, 2020 · US
Signal processing circuit and related chip, flow meter and method
US-2020284630-A1 · Sep 10, 2020 · US
Method for measuring a speed of a fluid
US-2020232829-A1 · Jul 23, 2020 · US
Dynamic temperature calibration of ultrasonic transducers
US-2020209031-A1 · Jul 2, 2020 · US
Flow path sensing for flow therapy apparatus
US-2020054847-A1 · Feb 20, 2020 · US
Ultrasonic flowmeter and method using partial flow measurements
US-10564017-B2 · Feb 18, 2020 · US
Method for estimating time of flight for acoustic pyrometry
US-10509124-B2 · Dec 17, 2019 · US
Fluid meter and fluid measuring module for a fluid measuring device and assembly
US-2019368907-A1 · Dec 5, 2019 · US
Method and measuring device for determining measurement information
US-2019323870-A1 · Oct 24, 2019 · US
Flow rate measurement device
US-10451470-B2 · Oct 22, 2019 · US
Noninvasive acoustical property measurement of fluids
US-2019242851-A1 · Aug 8, 2019 · US
Method and apparatus for determining a corrected value for the viscosity-dependent sonic velocity in a fluid to be tested
US-2019226894-A1 · Jul 25, 2019 · US
Ultrasonic flowmeter and method using partial flow measurements
US-2019219429-A1 · Jul 18, 2019 · US
Flow rate measurement method and apparatus
US-10352741-B2 · Jul 16, 2019 · US
Ultrasonic measuring device and a method for the ultrasonic measurement on a flowing fluid
US-2019154480-A1 · May 23, 2019 · US
Ultrasonic flowmeter
US-2019078919-A1 · Mar 14, 2019 · US
Ultrasonic flowmeter having transceivers driving and radially pressing the flow tube to increase amplitude of the ultrasonic wave
US-10197424-B2 · Feb 5, 2019 · US
Measurement unit and flow rate meter
US-10184816-B2 · Jan 22, 2019 · US
Measuring instrument and processing apparatus
US-2019011298-A1 · Jan 10, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G01F1/668?
- CPC G01F1/668 is the Cooperative Patent Classification code for “Compensating or correcting for variations in velocity of sound.”
- How many patents are filed under CPC G01F1/668 (Compensating or correcting for variations in velocity of sound)?
- Our database includes 185 publications tagged with this CPC code.
- Is patent activity under CPC G01F1/668 growing?
- Publication counts under this code: 21 in 2024 vs 17 in 2025 (latest complete years).