- All sections
- B - Performing operations; transporting
- B64C - Aeroplanes; helicopters
- B64C 27/72 - Means acting on blades
Patent holdings for IPC class B64C 27/72
Total number of patents in this class: 192
10-year publication summary
|
25
|
17
|
14
|
21
|
28
|
20
|
17
|
13
|
8
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sikorsky Aircraft Corporation | 1150 |
27 |
| Bell Helicopter Textron Inc. | 1122 |
18 |
| Textron Innovations Inc. | 2138 |
16 |
| The Boeing Company | 19843 |
14 |
| Airbus Helicopters Deutschland GmbH | 324 |
10 |
| Skyworks Global Inc | 42 |
9 |
| MagLev Aero Inc. | 13 |
8 |
| Airbus Helicopters | 984 |
5 |
| Claverham Ltd. | 31 |
5 |
| Leonardo S.p.A. | 605 |
4 |
| Airbus Helicopters Technik GmbH | 24 |
4 |
| Lockheed Martin Corporation | 3406 |
3 |
| Amazon Technologies, Inc. | 24422 |
3 |
| Karem Aircraft, Inc. | 37 |
3 |
| OverAir, Inc. | 39 |
3 |
| Hyper Q Aerospace Holdings Pty Ltd | 4 |
3 |
| Leonardo UK Ltd | 104 |
3 |
| Denso Corporation | 23338 |
2 |
| ZF Friedrichshafen AG | 6820 |
2 |
| AgustaWestland Limited | 6 |
2 |
| Other owners | 48 |