- All sections
- B - Performing operations; transporting
- B64C - Aeroplanes; helicopters
- B64C 27/39 - Rotors having articulated joints with individually articulated blades, i.e. with flapping or drag hinges
Patent holdings for IPC class B64C 27/39
Total number of patents in this class: 67
10-year publication summary
|
5
|
10
|
6
|
6
|
16
|
2
|
4
|
4
|
3
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Textron Innovations Inc. | 2138 |
11 |
| The Boeing Company | 19843 |
6 |
| Bell Helicopter Textron Inc. | 1122 |
6 |
| Airbus Helicopters | 984 |
4 |
| Sikorsky Aircraft Corporation | 1150 |
4 |
| Amazon Technologies, Inc. | 24422 |
3 |
| Wing Aviation LLC | 390 |
3 |
| Airbus Helicopters Deutschland GmbH | 324 |
2 |
| Defendtex Pty. Ltd. | 12 |
2 |
| Lord Corporation | 484 |
2 |
| Lockheed Martin Corporation | 3406 |
1 |
| Rolls-Royce PLC | 2944 |
1 |
| Board of Regents, The University of Texas System | 5370 |
1 |
| The Trustees of the University of Pennsylvania | 4122 |
1 |
| AVX Aircraft Company | 13 |
1 |
| Davis Aircraft Products Co., Inc. | 7 |
1 |
| HangZhou Zero Zero Technology Co., Ltd. | 76 |
1 |
| Hood Technology Corporation | 53 |
1 |
| Karem Aircraft, Inc. | 37 |
1 |
| Kitty Hawk Corporation | 279 |
1 |
| Other owners | 14 |