Liquid sensor and hydraulic unit
US-12590943-B2 · Mar 31, 2026 · US
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using opto-electrically actuated indicating means
using opto-electrically actuated indicating means · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01F23/686 |
| Official title | {using opto-electrically actuated indicating means} |
| Display label | using opto-electrically actuated indicating means |
| Total patents | 20 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2017 | 1 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 3 |
| 2022 | 3 |
| 2023 | 5 |
| 2024 | 2 |
| 2025 | 1 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Leak monitoring for high voltage cable terminations
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Liquid supply system and liquid preparation method
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Systems and methods for monitoring annular fluid level
US-11982176-B2 · May 14, 2024 · US
Liquid supply system and liquid preparation method
US-2024059549-A1 · Feb 22, 2024 · US
Liquid supply system and liquid preparation method
US-11834322-B2 · Dec 5, 2023 · US
System and method to measure mud level in a wellbore annulus
US-11802788-B2 · Oct 31, 2023 · US
System and method to measure mud level in a wellbore annulus
US-11629990-B2 · Apr 18, 2023 · US
Incubation cassette and microplate for reducing fluid evaporation out of wells of a microplate
US-2023083515-A1 · Mar 16, 2023 · US
Tank gauging and inventory management system
US-11561122-B2 · Jan 24, 2023 · US
Liquid supply system and liquid preparation method
US-2022306449-A1 · Sep 29, 2022 · US
Liquid sensor and hydraulic unit
US-2022228983-A1 · Jul 21, 2022 · US
Liquefied gas storage tank
US-2022146050-A1 · May 12, 2022 · US
Validation of fluid level sensors
US-11193810-B2 · Dec 7, 2021 · US
System and method to measure mud level in a wellbore annulus
US-2021364336-A1 · Nov 25, 2021 · US
Validation of fluid level sensors
US-2021239510-A1 · Aug 5, 2021 · US
Tank gauging and inventory management system
US-2020340848-A1 · Oct 29, 2020 · US
Drain control device for a filter system as well as filter system with a drain control device
US-10406464-B2 · Sep 10, 2019 · US
Indication type level indicator including total reflection prism
US-10234326-B2 · Mar 19, 2019 · US
Drain Control Device for a Filter System as well as Filter System with a Drain Control Device
US-2017312668-A1 · Nov 2, 2017 · US