- 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: 298
10-year publication summary
|
14
|
30
|
45
|
33
|
37
|
26
|
23
|
25
|
14
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Textron Innovations Inc. | 2386 |
41 |
| Bell Helicopter Textron Inc. | 988 |
23 |
| Wisk Aero LLC | 257 |
17 |
| Leonardo S.p.A. | 683 |
12 |
| Joby Aero, Inc. | 343 |
10 |
| Archer Aviation Inc. | 336 |
8 |
| Bell Textron Inc. | 68 |
7 |
| General Electric Company | 13811 |
5 |
| Dalian University of Technology | 1570 |
5 |
| Kitty Hawk Corporation | 305 |
5 |
| Subaru Corporation | 3830 |
5 |
| Supernal LLC, AKA Supernal | 123 |
5 |
| Airbus Helicopters | 937 |
4 |
| Amazon Technologies, Inc. | 27588 |
4 |
| Pterodynamics Inc | 6 |
4 |
| Aeronext Inc. | 184 |
4 |
| Method Aeronautics, LLC | 6 |
4 |
| Denso Corporation | 25074 |
3 |
| Joby Aviation, Inc. | 4 |
3 |
| Karem Aircraft, Inc. | 39 |
3 |
| Other owners | 126 |