Method for operating a wind farm
US-2017373533-A1 · Dec 28, 2017 · US
storing electrical energy
storing electrical energy · 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 | F03D9/11 |
| Official title | storing electrical energy |
| Display label | storing electrical energy |
| Total patents | 263 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 24 |
| 2016 | 17 |
| 2017 | 23 |
| 2018 | 21 |
| 2019 | 23 |
| 2020 | 29 |
| 2021 | 21 |
| 2022 | 25 |
| 2023 | 23 |
| 2024 | 19 |
| 2025 | 32 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Wind power generation system and wind power generation method
US-9841005-B2 · Dec 12, 2017 · US
System and method for extending the operating life of a wind turbine gear train based on energy storage
US-9835136-B2 · Dec 5, 2017 · US
Design of a wind turbine
US-2017321652-A1 · Nov 9, 2017 · US
Blade pitch system with a dual winding actuator
US-9797375-B2 · Oct 24, 2017 · US
Method for responding to a grid event
US-2017298904-A1 · Oct 19, 2017 · US
Airborne rigid kite with on-board power plant for ship propulsion
US-9784243-B2 · Oct 10, 2017 · US
Inrush current protection for wind turbines and wind farms
US-9745959-B2 · Aug 29, 2017 · US
Internal Mounted Cylindrical Turbine For Electricity Generation Using Exterior Flush And Scoop Intakes
US-2017241406-A1 · Aug 24, 2017 · US
Low temperature liquid metal batteries for energy storage applications
US-2017214096-A1 · Jul 27, 2017 · US
System and method for controlling wind turbines in wind farms
US-9709037-B2 · Jul 18, 2017 · US
Method for operating an energy installation, and an energy system having such energy installations
US-9667099-B2 · May 30, 2017 · US
Pre-Charging a Capacitor Bank
US-2017117722-A1 · Apr 27, 2017 · US
Wind power generating system
US-9617980-B2 · Apr 11, 2017 · US
Wind turbine systems and air channels in vehicles for enhancing energy generation, cooling, and aerodynamics
US-2017082092-A1 · Mar 23, 2017 · US
Method for black starting wind turbine, wind farm, and restoring wind farm and wind turbine, wind farm using the same
US-2017074244-A1 · Mar 16, 2017 · US
Method for Controlling a Wind Turbine
US-2017067443-A1 · Mar 9, 2017 · US
Power supply arrangement of a wind farm
US-9590452-B2 · Mar 7, 2017 · US
Installation For Transmitting Electrical Power
US-2017005478-A1 · Jan 5, 2017 · US
Power generation system
US-2016352102-A1 · Dec 1, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F03D9/11?
- CPC F03D9/11 is the Cooperative Patent Classification code for “storing electrical energy.”
- How many patents are filed under CPC F03D9/11 (storing electrical energy)?
- Our database includes 263 publications tagged with this CPC code.
- Is patent activity under CPC F03D9/11 growing?
- Publication counts under this code: 19 in 2024 vs 32 in 2025 (latest complete years).