Systems, methods, and mechanical designs for inverters for evtol aircraft
US-2024253796-A1 · Aug 1, 2024 · US
Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement · Cooperative Patent Classification (CPC)
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Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B64C27/54 |
| Official title | Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement |
| Display label | Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement |
| Total patents | 330 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 20 |
| 2016 | 16 |
| 2017 | 54 |
| 2018 | 21 |
| 2019 | 39 |
| 2020 | 24 |
| 2021 | 25 |
| 2022 | 14 |
| 2023 | 22 |
| 2024 | 49 |
| 2025 | 43 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Vertical takeoff and landing (VTOL) air vehicle
US-9834305-B2 · Dec 5, 2017 · US
Method and a device for assisting the piloting of an aircraft, and an aircraft
US-2017341771-A1 · Nov 30, 2017 · US
Independent hydraulic control system for rotorcraft secondary rotor
US-9815553-B2 · Nov 14, 2017 · US
System for driving a slat device of an aircraft wing
US-2017320566-A1 · Nov 9, 2017 · US
Aircraft and method of orienting an airframe of an aircraft
US-2017308101-A1 · Oct 26, 2017 · US
Noise modes for rotary wing aircraft
US-2017305540-A1 · Oct 26, 2017 · US
Modular rotor craft rotor hub system
US-9796469-B2 · Oct 24, 2017 · US
Aircraft main rotor drag to airframe drag
US-2017297696-A1 · Oct 19, 2017 · US
Dual rotor, rotary wing aircraft
US-2017274994-A1 · Sep 28, 2017 · US
Adjustable Blade-to-Hub Lead-Lag Damper Attachment
US-2017253327-A1 · Sep 7, 2017 · US
Helicopter Anti-Torque Rotor
US-2017253328-A1 · Sep 7, 2017 · US
Lift offset control of a rotary wing aircraft
US-2017233068-A1 · Aug 17, 2017 · US
Rotorcraft operational altitude and airspeed
US-2017225775-A1 · Aug 10, 2017 · US
Aircraft design for air to air refueling
US-2017225797-A1 · Aug 10, 2017 · US
Dual rotor, rotary wing aircraft
US-2017217582-A1 · Aug 3, 2017 · US
Active vibration control of a rotorcraft
US-2017217575-A1 · Aug 3, 2017 · US
Blade indexing of a rotary wing aircraft
US-2017217581-A1 · Aug 3, 2017 · US
Vector limiting of a rotor control volume
US-2017220047-A1 · Aug 3, 2017 · US
System for shimming blade fold angle about an axis of rotation
US-2017217580-A1 · Aug 3, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B64C27/54?
- CPC B64C27/54 is the Cooperative Patent Classification code for “Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement.”
- How many patents are filed under CPC B64C27/54 (Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement)?
- Our database includes 330 publications tagged with this CPC code.
- Is patent activity under CPC B64C27/54 growing?
- Publication counts under this code: 49 in 2024 vs 43 in 2025 (latest complete years).