- 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: 1020
10-year publication summary
|
130
|
119
|
88
|
93
|
93
|
63
|
62
|
42
|
44
|
12
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 9242 |
250 |
| Safran Aircraft Engines | 6172 |
169 |
| General Electric Company | 17076 |
78 |
| Rolls-Royce Corporation | 1717 |
72 |
| Siemens AG | 24544 |
47 |
| Rolls-Royce North American Technologies, Inc. | 1153 |
35 |
| Rolls-Royce PLC | 3011 |
34 |
| MTU Aero Engines AG | 669 |
28 |
| GE Infrastructure Technology, LLC | 6163 |
28 |
| Pratt & Whitney Canada Corp. | 4477 |
23 |
| Siemens Energy, Inc. | 1697 |
20 |
| Siemens Energy Global GmbH & Co. KG | 2872 |
17 |
| Safran Aero Boosters SA | 182 |
14 |
| MTU Aero Engines GmbH | 508 |
13 |
| SNECMA S.A. | 1145 |
11 |
| Centre National de La Recherche Scientifique | 10202 |
11 |
| Universite Paul Sabatier Toulouse III | 478 |
11 |
| Nuovo Pignone Tecnologie S.r.l. | 912 |
11 |
| Mitsubishi Heavy Industries Aero Engines, Ltd. | 131 |
8 |
| Safran Ceramics | 401 |
8 |
| Other owners | 132 |