Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods
US-12497879-B2 · Dec 16, 2025 · US
Maintaining oil level (level control in general G05D9/00)
Maintaining oil level (level control in general G05D9/00) · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F16N19/006 |
| Official title | {Maintaining oil level (level control in general G05D9/00)} |
| Display label | Maintaining oil level (level control in general G05D9/00) |
| Total patents | 40 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 5 |
| 2020 | 8 |
| 2021 | 1 |
| 2022 | 7 |
| 2023 | 6 |
| 2024 | 3 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Control method and control device for compressor unit
US-2025334126-A1 · Oct 30, 2025 · US
Fluid management system for a drivetrain
US-12344036-B2 · Jul 1, 2025 · US
Fluid management system for a drivetrain
US-2025033410-A1 · Jan 30, 2025 · US
Device and method for filling an oil reservoir of an aircraft engine
US-11964779-B2 · Apr 23, 2024 · US
Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods
US-2024093583-A1 · Mar 21, 2024 · US
Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods
US-11859482-B2 · Jan 2, 2024 · US
Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods
US-2023203927-A1 · Jun 29, 2023 · US
Power transmission device for helicopter
US-2023137698-A1 · May 4, 2023 · US
Integrated system and method for automatic rejuvenation of turbine oil for improving equipment reliability
US-11639771-B2 · May 2, 2023 · US
Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods
US-11629584-B2 · Apr 18, 2023 · US
Lubrication pressue control of a power transmission device for helicopter
US-11618556-B2 · Apr 4, 2023 · US
Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods
US-2023055844-A1 · Feb 23, 2023 · US
Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods
US-11530602-B2 · Dec 20, 2022 · US
Device for supplying an oil tank from a second tank
US-11512615-B2 · Nov 29, 2022 · US
Sump Fluid Level Regulation Method and System
US-2022268185-A1 · Aug 25, 2022 · US
Integrated system and method for automatic rejuvenation of turbine oil for improving equipment reliability
US-2022252220-A1 · Aug 11, 2022 · US
Device and method for filling an oil reservoir of an aircraft engine
US-2022212816-A1 · Jul 7, 2022 · US
Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods
US-2022112889-A1 · Apr 14, 2022 · US
Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods
US-11236739-B2 · Feb 1, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16N19/006?
- CPC F16N19/006 is the Cooperative Patent Classification code for “Maintaining oil level (level control in general G05D9/00).”
- How many patents are filed under CPC F16N19/006 (Maintaining oil level (level control in general G05D9/00))?
- Our database includes 40 publications tagged with this CPC code.
- Is patent activity under CPC F16N19/006 growing?
- Publication counts under this code: 3 in 2024 vs 4 in 2025 (latest complete years).