- All sections
- B - Performing operationstransporting
- B64C - Aeroplaneshelicopters
- B64C 27/33 - Rotors having flexing arms
Patent holdings for IPC class B64C 27/33
Total number of patents in this class: 106
10-year publication summary
|
22
|
7
|
11
|
6
|
5
|
3
|
3
|
0
|
1
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sikorsky Aircraft Corporation | 1077 |
32 |
| Textron Innovations Inc. | 2389 |
23 |
| Airbus Helicopters Deutschland GmbH | 324 |
14 |
| Bell Helicopter Textron Inc. | 973 |
12 |
| Bell Textron Rhode Island Inc. | 69 |
4 |
| Lockheed Martin Corporation | 3277 |
3 |
| Bell Helicopter Rhode Island, Inc. | 48 |
3 |
| Kopter Group AG | 37 |
3 |
| The Boeing Company | 20102 |
2 |
| Airbus Helicopters | 926 |
1 |
| Massachusetts Institute of Technology | 10192 |
1 |
| Rohr, Inc. | 773 |
1 |
| Skydio, Inc. | 495 |
1 |
| The United States of America as represented by the Secretary of the Air Force | 896 |
1 |
| Mitsubishi Heavy Industries Thermal Systems, Ltd. | 959 |
1 |
| Aeronext Inc. | 184 |
1 |
| Spear U.a.v Ltd | 8 |
1 |
| Jaunt Air Mobility | 1 |
1 |
| PPG Advanced Surface Technologies, LLC | 58 |
1 |
| Other owners | 0 |