- 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: 462
10-year publication summary
|
38
|
62
|
57
|
85
|
99
|
75
|
51
|
42
|
26
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Amazon Technologies, Inc. | 25836 |
20 |
| Textron Innovations Inc. | 2191 |
17 |
| Kitty Hawk Corporation | 286 |
16 |
| SZ DJI Technology Co., Ltd | 6809 |
15 |
| MagLev Aero Inc. | 17 |
12 |
| Airbus Helicopters Deutschland GmbH | 331 |
9 |
| Mitsubishi Heavy Industries, Ltd. | 8515 |
7 |
| Eth Zurich | 1249 |
7 |
| Panasonic Intellectual Property Management Co., Ltd. | 29620 |
6 |
| The Boeing Company | 19901 |
5 |
| Korea Aerospace Research Institute | 308 |
5 |
| University of Kansas | 859 |
5 |
| FLYON Aerosystems Ltd. | 7 |
5 |
| Dronexus Aero LLC | 10 |
5 |
| Snap Inc. | 5301 |
4 |
| Dr. Ing. h.c. F. Porsche Aktiengesellschaft | 2632 |
4 |
| Urban Aeronautics Ltd. | 26 |
4 |
| Acsl Ltd. | 33 |
4 |
| Disney Enterprises, Inc. | 6049 |
3 |
| Qualcomm Incorporated | 81413 |
3 |
| Other owners | 306 |