- All sections
- B - Performing operationstransporting
- B64C - Aeroplaneshelicopters
- B64C 27/51 - Damping of blade movements
Patent holdings for IPC class B64C 27/51
Total number of patents in this class: 165
10-year publication summary
|
16
|
25
|
17
|
13
|
9
|
6
|
3
|
2
|
3
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Bell Helicopter Textron Inc. | 1050 |
39 |
| Sikorsky Aircraft Corporation | 1105 |
26 |
| Textron Innovations Inc. | 2304 |
23 |
| Airbus Helicopters | 970 |
18 |
| Lord Corporation | 470 |
16 |
| The Boeing Company | 20048 |
5 |
| Airbus Helicopters Deutschland GmbH | 329 |
3 |
| Hutchinson | 470 |
3 |
| Mitsubishi Heavy Industries, Ltd. | 8703 |
2 |
| Innostar | 9 |
2 |
| Kopter Group AG | 36 |
2 |
| Ideaforge Technology Pvt. Ltd. | 33 |
2 |
| Bell Textron Inc. | 70 |
2 |
| Caterpillar Inc. | 9539 |
1 |
| Hamilton Sundstrand Corporation | 4860 |
1 |
| Aktiebolaget SKF | 2937 |
1 |
| Alion Science and Technology Corporation | 14 |
1 |
| Aurora Flight Sciences Corporation | 240 |
1 |
| AVX Aircraft Company | 13 |
1 |
| Deutsches Zentrum für Luft- und Raumfahrt e.V. | 790 |
1 |
| Other owners | 15 |