- All sections
- B - Performing operationstransporting
- B64C - Aeroplaneshelicopters
- B64C 27/22 - Compound rotorcraft, i.e. aircraft using in flight the features of both aeroplane and rotorcraft
Patent holdings for IPC class B64C 27/22
Total number of patents in this class: 297
10-year publication summary
|
29
|
32
|
26
|
19
|
39
|
28
|
16
|
24
|
11
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Textron Innovations Inc. | 2389 |
26 |
| Airbus Helicopters | 926 |
23 |
| Bell Helicopter Textron Inc. | 973 |
16 |
| Sikorsky Aircraft Corporation | 1077 |
15 |
| Wisk Aero LLC | 258 |
14 |
| The Boeing Company | 20102 |
12 |
| Joby Aero, Inc. | 348 |
11 |
| SZ DJI Technology Co., Ltd | 6898 |
9 |
| Amazon Technologies, Inc. | 27656 |
8 |
| Piasecki Aircraft Corporation | 39 |
7 |
| Kitty Hawk Corporation | 306 |
6 |
| Leonardo S.p.A. | 684 |
6 |
| Aergility Corporation | 7 |
6 |
| Denso Corporation | 25132 |
4 |
| Karem Aircraft, Inc. | 39 |
4 |
| Autoflight (Kunshan) Co., Ltd. | 72 |
4 |
| Honda Motor Co., Ltd. | 25846 |
3 |
| SkyKar Inc. | 5 |
3 |
| Swift Engineering Inc. | 35 |
3 |
| Autel Robotics Co. Ltd. | 1053 |
3 |
| Other owners | 114 |