- 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: 302
10-year publication summary
|
22
|
41
|
46
|
38
|
48
|
32
|
25
|
28
|
17
|
8
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Textron Innovations Inc. | 2443 |
41 |
| Bell Helicopter Textron Inc. | 961 |
23 |
| Wisk Aero LLC | 280 |
17 |
| Leonardo S.p.A. | 698 |
13 |
| Joby Aero, Inc. | 374 |
11 |
| Archer Aviation Inc. | 404 |
8 |
| Bell Textron Inc. | 67 |
7 |
| General Electric Company | 13910 |
5 |
| Dalian University of Technology | 1594 |
5 |
| Kitty Hawk Corporation | 303 |
5 |
| Subaru Corporation | 4015 |
5 |
| Supernal LLC, AKA Supernal | 138 |
5 |
| Airbus Helicopters | 952 |
4 |
| Amazon Technologies, Inc. | 28118 |
4 |
| Pterodynamics Inc | 6 |
4 |
| Aeronext Inc. | 188 |
4 |
| Method Aeronautics, LLC | 6 |
4 |
| Denso Corporation | 25579 |
3 |
| Joby Aviation, Inc. | 4 |
3 |
| Karem Aircraft, Inc. | 36 |
3 |
| Other owners | 128 |