- All sections
- B - Performing operationstransporting
- B64C - Aeroplaneshelicopters
- B64C 27/52 - Tilting of rotor bodily relative to fuselage
Patent holdings for IPC class B64C 27/52
Total number of patents in this class: 349
10-year publication summary
|
26
|
48
|
40
|
56
|
57
|
47
|
34
|
29
|
22
|
9
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Textron Innovations Inc. | 2295 |
53 |
| Bell Helicopter Textron Inc. | 1052 |
23 |
| Sikorsky Aircraft Corporation | 1105 |
14 |
| The Boeing Company | 20031 |
13 |
| Amazon Technologies, Inc. | 26528 |
13 |
| Joby Aero, Inc. | 300 |
13 |
| Kitty Hawk Corporation | 299 |
6 |
| Amsl Innovations Pty Ltd | 12 |
6 |
| Korea Aerospace Research Institute | 317 |
5 |
| Wisk Aero LLC | 217 |
5 |
| Lockheed Martin Corporation | 3277 |
4 |
| Aurora Flight Sciences Corporation | 241 |
4 |
| Leonardo S.p.A. | 660 |
4 |
| Nexter Systems | 153 |
4 |
| Zhejiang Geely Holding Group Co., Ltd. | 1499 |
4 |
| Autel Robotics Co. Ltd. | 1014 |
4 |
| Skyworks Global Inc | 42 |
4 |
| Airbus Helicopters | 964 |
3 |
| Deakin University | 127 |
3 |
| Fundacion Tecnalia Research & Innovation | 216 |
3 |
| Other owners | 161 |