- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 11/04 - Preventing or minimising internal leakage of working fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
Patent holdings for IPC class F01D 11/04
Total number of patents in this class: 331
10-year publication summary
|
39
|
38
|
14
|
17
|
17
|
10
|
12
|
19
|
13
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 10127 |
37 |
| Safran Aircraft Engines | 6727 |
30 |
| General Electric Company | 13915 |
29 |
| Siemens AG | 23996 |
22 |
| Nuovo Pignone Tecnologie S.r.l. | 1223 |
19 |
| GE Infrastructure Technology, LLC | 6159 |
16 |
| Stein Seal Company | 66 |
13 |
| Siemens Energy Global GmbH & Co. KG | 3432 |
12 |
| Mitsubishi Heavy Industries, Ltd. | 9168 |
10 |
| Mitsubishi Power, Ltd. | 1833 |
9 |
| Siemens Energy, Inc. | 1686 |
7 |
| Pratt & Whitney Canada Corp. | 5517 |
6 |
| Mitsubishi Heavy Industries Compressor Corporation | 650 |
6 |
| Mitsubishi Hitachi Power Systems, Ltd. | 991 |
5 |
| Rolls-Royce North American Technologies, Inc. | 1130 |
5 |
| Turboden SpA | 63 |
5 |
| Rolls-Royce PLC | 3224 |
4 |
| Doosan Heavy Industries & Construction Co., Ltd. | 580 |
4 |
| SNECMA S.A. | 1145 |
3 |
| Cryostar SAS | 116 |
3 |
| Other owners | 86 |