- All sections
- B - Performing operationstransporting
- B64C - Aeroplaneshelicopters
- B64C 27/28 - Compound rotorcraft, i.e. aircraft using in flight the features of both aeroplane and rotorcraft with forward-propulsion propellers pivotable to act as lifting rotors
Patent holdings for IPC class B64C 27/28
Total number of patents in this class: 295
10-year publication summary
|
13
|
14
|
30
|
45
|
33
|
37
|
26
|
23
|
26
|
14
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Textron Innovations Inc. | 2372 |
41 |
| Bell Helicopter Textron Inc. | 1017 |
24 |
| Wisk Aero LLC | 244 |
17 |
| Leonardo S.p.A. | 676 |
12 |
| Joby Aero, Inc. | 326 |
10 |
| Archer Aviation Inc. | 311 |
8 |
| Bell Textron Inc. | 69 |
7 |
| General Electric Company | 13801 |
5 |
| Dalian University of Technology | 1545 |
5 |
| Kitty Hawk Corporation | 305 |
5 |
| Subaru Corporation | 3752 |
5 |
| Supernal LLC, AKA Supernal | 117 |
5 |
| Airbus Helicopters | 946 |
4 |
| Amazon Technologies, Inc. | 27291 |
4 |
| Pterodynamics Inc | 6 |
4 |
| Aeronext Inc. | 182 |
4 |
| Denso Corporation | 24842 |
3 |
| Joby Aviation, Inc. | 4 |
3 |
| Karem Aircraft, Inc. | 39 |
3 |
| Autel Robotics Co. Ltd. | 1031 |
3 |
| Other owners | 123 |