- 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: 981
10-year publication summary
|
89
|
97
|
85
|
67
|
47
|
37
|
45
|
65
|
48
|
27
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 10128 |
162 |
| General Electric Company | 13910 |
92 |
| Safran Aircraft Engines | 6704 |
84 |
| Mitsubishi Heavy Industries, Ltd. | 9139 |
60 |
| Siemens AG | 24020 |
41 |
| GE Infrastructure Technology, LLC | 6165 |
41 |
| Mitsubishi Power, Ltd. | 1834 |
37 |
| Pratt & Whitney Canada Corp. | 5506 |
31 |
| Mitsubishi Hitachi Power Systems, Ltd. | 991 |
27 |
| Rolls-Royce Corporation | 1677 |
26 |
| Siemens Energy, Inc. | 1684 |
22 |
| Siemens Energy Global GmbH & Co. KG | 3357 |
22 |
| United Technologies Corporation | 2220 |
17 |
| MTU Aero Engines AG | 730 |
13 |
| Nuovo Pignone Tecnologie S.r.l. | 1219 |
13 |
| SNECMA S.A. | 1146 |
12 |
| Rolls-Royce North American Technologies, Inc. | 1129 |
12 |
| Hamilton Sundstrand Corporation | 5014 |
10 |
| Doosan Heavy Industries & Construction Co., Ltd. | 580 |
9 |
| Rolls-Royce PLC | 3223 |
8 |
| Other owners | 242 |