- All sections
- B - Performing operationstransporting
- B64C - Aeroplaneshelicopters
- B64C 27/78 - Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement in association with pitch adjustment of blades of anti-torque rotor
Patent holdings for IPC class B64C 27/78
Total number of patents in this class: 84
10-year publication summary
|
6
|
16
|
7
|
3
|
11
|
13
|
3
|
6
|
3
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sikorsky Aircraft Corporation | 1099 |
18 |
| Textron Innovations Inc. | 2334 |
14 |
| Leonardo S.p.A. | 667 |
10 |
| Bell Helicopter Textron Inc. | 1061 |
7 |
| Airbus Helicopters | 972 |
5 |
| Airbus Helicopters Deutschland GmbH | 330 |
4 |
| Microtecnica S.r.l. | 89 |
3 |
| Lockheed Martin Corporation | 3274 |
2 |
| Societe de Commercialisation des Produits de La Recherche Appliquee Socpra Sciences et Genie S.E.C. | 54 |
2 |
| Bell Textron Rhode Island Inc. | 78 |
2 |
| Honda Motor Co., Ltd. | 25499 |
1 |
| The Boeing Company | 20124 |
1 |
| Pratt & Whitney Canada Corp. | 4818 |
1 |
| Board of Regents, The University of Texas System | 5860 |
1 |
| Georgia Tech Research Corporation | 2762 |
1 |
| Northwestern University | 3417 |
1 |
| The Aerospace Corporation | 420 |
1 |
| Claverham Ltd. | 31 |
1 |
| Korea Aerospace Research Institute | 316 |
1 |
| Safran Aircraft Engines | 6306 |
1 |
| Other owners | 7 |