- All sections
- B - Performing operationstransporting
- B64C - Aeroplaneshelicopters
- B64C 27/54 - Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
Patent holdings for IPC class B64C 27/54
Total number of patents in this class: 220
10-year publication summary
|
20
|
32
|
18
|
13
|
6
|
16
|
13
|
11
|
23
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Bell Helicopter Textron Inc. | 1052 |
33 |
| Sikorsky Aircraft Corporation | 1106 |
33 |
| Archer Aviation Inc. | 214 |
23 |
| Textron Innovations Inc. | 2295 |
15 |
| Airbus Helicopters | 965 |
13 |
| The Boeing Company | 20025 |
8 |
| SZ DJI Technology Co., Ltd | 6840 |
8 |
| Leonardo S.p.A. | 657 |
6 |
| AeroVironment, Inc. | 533 |
5 |
| Airbus Helicopters Deutschland GmbH | 327 |
5 |
| Merlin Technology, Inc. | 161 |
3 |
| Aeronext Inc. | 163 |
3 |
| Beta Air, LLC | 596 |
3 |
| Airbus Helicopters Technik GmbH | 28 |
3 |
| ZF Friedrichshafen AG | 7135 |
2 |
| Karem Aircraft, Inc. | 38 |
2 |
| Microtecnica S.r.l. | 86 |
2 |
| Suntech Enterprises | 5 |
2 |
| The United States of America as represented by the Secretary of the Air Force | 837 |
2 |
| FLIR Unmanned Aerial Systems AS | 37 |
2 |
| Other owners | 47 |