- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 11/12 - Preventing or minimising internal leakage of working fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible, deformable or resiliently biased part
Patent holdings for IPC class F01D 11/12
Total number of patents in this class: 1043
10-year publication summary
|
110
|
85
|
87
|
90
|
60
|
61
|
43
|
44
|
35
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 9765 |
264 |
| Safran Aircraft Engines | 6473 |
173 |
| General Electric Company | 13777 |
80 |
| Rolls-Royce Corporation | 1691 |
69 |
| Siemens AG | 24291 |
46 |
| Rolls-Royce PLC | 3173 |
35 |
| Rolls-Royce North American Technologies, Inc. | 1143 |
32 |
| MTU Aero Engines AG | 709 |
28 |
| GE Infrastructure Technology, LLC | 6206 |
27 |
| Pratt & Whitney Canada Corp. | 5077 |
25 |
| Siemens Energy, Inc. | 1698 |
20 |
| Siemens Energy Global GmbH & Co. KG | 3173 |
18 |
| Safran Aero Boosters SA | 184 |
14 |
| Centre National de La Recherche Scientifique | 10812 |
13 |
| SNECMA S.A. | 1148 |
11 |
| MTU Aero Engines GmbH | 455 |
11 |
| Universite Paul Sabatier Toulouse III | 477 |
11 |
| Nuovo Pignone Tecnologie S.r.l. | 1110 |
11 |
| Mitsubishi Heavy Industries Aero Engines, Ltd. | 137 |
8 |
| Safran Ceramics | 420 |
8 |
| Other owners | 139 |