- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 11/02 - Preventing or minimising internal leakage of working fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
Patent holdings for IPC class F01D 11/02
Total number of patents in this class: 942
10-year publication summary
|
101
|
85
|
96
|
84
|
66
|
45
|
37
|
42
|
57
|
31
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 9410 |
156 |
| General Electric Company | 13810 |
87 |
| Safran Aircraft Engines | 6294 |
76 |
| Mitsubishi Heavy Industries, Ltd. | 8752 |
56 |
| Siemens AG | 24453 |
41 |
| GE Infrastructure Technology, LLC | 6233 |
41 |
| Mitsubishi Power, Ltd. | 1772 |
35 |
| Mitsubishi Hitachi Power Systems, Ltd. | 993 |
27 |
| Rolls-Royce Corporation | 1739 |
26 |
| Pratt & Whitney Canada Corp. | 4793 |
25 |
| Siemens Energy, Inc. | 1713 |
21 |
| Siemens Energy Global GmbH & Co. KG | 2978 |
21 |
| United Technologies Corporation | 2242 |
17 |
| Rolls-Royce North American Technologies, Inc. | 1169 |
13 |
| SNECMA S.A. | 1148 |
12 |
| MTU Aero Engines AG | 683 |
12 |
| Nuovo Pignone Tecnologie S.r.l. | 981 |
12 |
| Hamilton Sundstrand Corporation | 4891 |
10 |
| Doosan Heavy Industries & Construction Co., Ltd. | 581 |
9 |
| Rolls-Royce PLC | 3107 |
8 |
| Other owners | 237 |