Ink liquid level height measuring apparatus and image forming apparatus
US-2025100290-A1 · Mar 27, 2025 · US
Checking proper indicating of discrete level by floats
Checking proper indicating of discrete level by floats · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01F25/22 |
| Official title | {Checking proper indicating of discrete level by floats} |
| Display label | Checking proper indicating of discrete level by floats |
| Total patents | 29 |
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 | 3 |
| 2017 | 4 |
| 2018 | 3 |
| 2019 | 2 |
| 2020 | 5 |
| 2021 | 6 |
| 2022 | 1 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Foam detection technique-algorithm for steam boilers using lwco device
US-2025075900-A1 · Mar 6, 2025 · US
Method for the functional testing of a fluid level warning indicator
US-11951961-B2 · Apr 9, 2024 · US
Apparatus for determining a vertical level or density of a material column
US-11892336-B2 · Feb 6, 2024 · US
Apparatus for determining a vertical level or density profile of a fluid column
US-11555733-B2 · Jan 17, 2023 · US
Apparatus for determining a vertical level or density of a material column
US-2022397443-A1 · Dec 15, 2022 · US
Validation of fluid level sensors
US-11193810-B2 · Dec 7, 2021 · US
Method for producing remaining fuel detection device and fuel supply module
US-11150125-B2 · Oct 19, 2021 · US
Fault detection system and method for liquid level sensing device
US-11125603-B2 · Sep 21, 2021 · US
Validation of fluid level sensors
US-2021239510-A1 · Aug 5, 2021 · US
An apparatus for determining a vertical level or density profile of a fluid column
US-2021199486-A1 · Jul 1, 2021 · US
Method for the functional testing of a fluid level warning indicator
US-2021053547-A1 · Feb 25, 2021 · US
Monitoring system and method
US-10845229-B2 · Nov 24, 2020 · US
Fault detection system and method for liquid level sensing device
US-2020355543-A1 · Nov 12, 2020 · US
Method for producing remaining fuel detection device and fuel supply module
US-2020182681-A1 · Jun 11, 2020 · US
Monitoring system and method
US-2020018630-A1 · Jan 16, 2020 · US
Method for radiometric limit level monitoring
US-10533889-B2 · Jan 14, 2020 · US
Functional diagnosis of an electromechanical fill state measuring device
US-10458832-B2 · Oct 29, 2019 · US
Method for calibrating a display of a filling level
US-10436628-B2 · Oct 8, 2019 · US
Systems and methods for fuel level estimation
US-10107672-B2 · Oct 23, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G01F25/22?
- CPC G01F25/22 is the Cooperative Patent Classification code for “Checking proper indicating of discrete level by floats.”
- How many patents are filed under CPC G01F25/22 (Checking proper indicating of discrete level by floats)?
- Our database includes 29 publications tagged with this CPC code.
- Is patent activity under CPC G01F25/22 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).