- All sections
- B - Performing operations; transporting
- B64C - Aeroplanes; helicopters
- B64C 27/57 - Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement characterised by the control initiating means, e.g. manually actuated automatic or condition responsive, e.g. responsive to rotor speed, torque or thrust
Patent holdings for IPC class B64C 27/57
Total number of patents in this class: 297
10-year publication summary
22
|
24
|
47
|
38
|
39
|
27
|
26
|
19
|
18
|
1
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Sikorsky Aircraft Corporation | 1150 |
52 |
Textron Innovations Inc. | 2138 |
43 |
Airbus Helicopters | 984 |
34 |
Bell Helicopter Textron Inc. | 1122 |
29 |
Merlin Technology, Inc. | 165 |
20 |
Amazon Technologies, Inc. | 24422 |
8 |
The Boeing Company | 19843 |
7 |
Pratt & Whitney Canada Corp. | 4215 |
7 |
Bell Textron Rhode Island Inc. | 124 |
5 |
Lockheed Martin Corporation | 3406 |
4 |
SkyRyse, Inc. | 61 |
4 |
Drone-control, LLC | 10 |
4 |
Mitsubishi Heavy Industries, Ltd. | 8217 |
3 |
Airbus Helicopters Deutschland GmbH | 324 |
3 |
Aurora Flight Sciences Corporation | 234 |
3 |
Kitty Hawk Corporation | 279 |
3 |
Piasecki Aircraft Corporation | 36 |
3 |
Skyworks Global Inc | 42 |
3 |
Unmanned Aerospace LLC | 5 |
3 |
Honda Motor Co., Ltd. | 24537 |
2 |
Other owners | 57 |