- All sections
- B - Performing operations; transporting
- B64C - Aeroplanes; helicopters
- B64C 11/28 - Collapsible or foldable blades
Patent holdings for IPC class B64C 11/28
Total number of patents in this class: 262
10-year publication summary
|
17
|
23
|
48
|
41
|
31
|
33
|
23
|
24
|
11
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Textron Innovations Inc. | 2192 |
57 |
| Bell Helicopter Textron Inc. | 1085 |
27 |
| Joby Aero, Inc. | 260 |
13 |
| Hyundai Motor Company | 20483 |
8 |
| Amazon Technologies, Inc. | 25909 |
8 |
| Anduril Industries Inc. | 143 |
7 |
| Kia Corporation | 8153 |
7 |
| Kitty Hawk Corporation | 286 |
6 |
| SZ DJI Technology Co., Ltd | 6811 |
6 |
| Wing Aviation LLC | 443 |
6 |
| Bell Textron Rhode Island Inc. | 85 |
6 |
| General Electric Company | 17789 |
5 |
| The Boeing Company | 19911 |
5 |
| Bell Helicopter Rhode Island, Inc. | 52 |
5 |
| Safran Helicopter Engines | 725 |
5 |
| Sikorsky Aircraft Corporation | 1123 |
5 |
| Northrop Grumman Systems Corporation | 2921 |
4 |
| Skydio, Inc. | 376 |
4 |
| Autel Robotics Co. Ltd. | 1007 |
4 |
| Beacon Lighting International Limited | 16 |
3 |
| Other owners | 71 |