- All sections
- B - Performing operations; transporting
- B64C - Aeroplanes; helicopters
- B64C 27/20 - Rotorcraft characterised by having shrouded rotors, e.g. flying platforms
Patent holdings for IPC class B64C 27/20
Total number of patents in this class: 455
10-year publication summary
|
28
|
38
|
62
|
57
|
85
|
100
|
74
|
51
|
41
|
10
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Amazon Technologies, Inc. | 24422 |
21 |
| SZ DJI Technology Co., Ltd | 6791 |
16 |
| Textron Innovations Inc. | 2138 |
16 |
| Kitty Hawk Corporation | 279 |
15 |
| MagLev Aero Inc. | 13 |
10 |
| Airbus Helicopters Deutschland GmbH | 324 |
9 |
| Eth Zurich | 1193 |
7 |
| Mitsubishi Heavy Industries, Ltd. | 8217 |
6 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
6 |
| The Boeing Company | 19843 |
5 |
| Korea Aerospace Research Institute | 293 |
5 |
| University of Kansas | 838 |
5 |
| Urban Aeronautics Ltd. | 29 |
5 |
| Dronexus Aero LLC | 9 |
5 |
| Dr. Ing. h.c. F. Porsche Aktiengesellschaft | 2487 |
4 |
| Qualcomm Incorporated | 76576 |
3 |
| Honda Motor Co., Ltd. | 24537 |
3 |
| Toyota Motor Corporation | 28582 |
3 |
| California Institute of Technology | 3884 |
3 |
| Snap Inc. | 4604 |
3 |
| Other owners | 305 |