Phonic wheel with output voltage tuning
US-10801360-B2 · Oct 13, 2020 · US
for equalising or synchronising power plants
for equalising or synchronising power plants · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B64D31/12 |
| Official title | for equalising or synchronising power plants |
| Display label | for equalising or synchronising power plants |
| Total patents | 230 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 11 |
| 2017 | 12 |
| 2018 | 14 |
| 2019 | 17 |
| 2020 | 26 |
| 2021 | 26 |
| 2022 | 16 |
| 2023 | 39 |
| 2024 | 31 |
| 2025 | 29 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of optimizing the noise generated in flight by a rotorcraft
US-2020309045-A1 · Oct 1, 2020 · US
System and method for aircraft noise mitigation
US-2020269990-A1 · Aug 27, 2020 · US
Unmanned aerial vehicle with decentralized control system
US-2019384288-A1 · Dec 19, 2019 · US
Method and a device for limiting torque on a rotorcraft having at least three motors with non-equal power distribution
US-2019382124-A1 · Dec 19, 2019 · US
System and method for starting the engines of a twin-engine aircraft
US-10494115-B2 · Dec 3, 2019 · US
Propulsor trim prediction for aircraft
US-2019332126-A1 · Oct 31, 2019 · US
Pitch trim prediction for aircraft
US-2019329879-A1 · Oct 31, 2019 · US
Pitch and thrust control for tilt-rotor aircraft
US-2019332125-A1 · Oct 31, 2019 · US
Pitch and thrust control for compound aircraft
US-2019332124-A1 · Oct 31, 2019 · US
Synchronization of aircraft engines
US-2019300192-A1 · Oct 3, 2019 · US
Method for braking permanent magnet synchronous motor and related device
US-2019273453-A1 · Sep 5, 2019 · US
Cross engine coordination during gas turbine engine motoring
US-10384791-B2 · Aug 20, 2019 · US
Multi-rotor tonal noise control for uav
US-2019185149-A1 · Jun 20, 2019 · US
Synchronization of aircraft engines
US-10301031-B2 · May 28, 2019 · US
Takeoff power management system and method for gas turbine engines
US-10293951-B2 · May 21, 2019 · US
Devices, systems, and methods for balancing closely coupled rotating machinery
US-10254773-B2 · Apr 9, 2019 · US
Speed control during motoring of a gas turbine engine
US-10221774-B2 · Mar 5, 2019 · US
Motor drive control device
US-2019068089-A1 · Feb 28, 2019 · US
Method and device for monitoring a deviation of a first rotational speed of a first drive unit for an aircraft from a second rotational speed of an at least second drive unit for an aircraft
US-10202199-B2 · Feb 12, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B64D31/12?
- CPC B64D31/12 is the Cooperative Patent Classification code for “for equalising or synchronising power plants.”
- How many patents are filed under CPC B64D31/12 (for equalising or synchronising power plants)?
- Our database includes 230 publications tagged with this CPC code.
- Is patent activity under CPC B64D31/12 growing?
- Publication counts under this code: 31 in 2024 vs 29 in 2025 (latest complete years).