- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 25/28 - Supporting or mounting arrangements, e.g. for turbine casing
Patent holdings for IPC class F01D 25/28
Total number of patents in this class: 1973
10-year publication summary
|
267
|
201
|
199
|
163
|
140
|
116
|
102
|
115
|
86
|
28
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 9313 |
319 |
| Safran Aircraft Engines | 6250 |
180 |
| GE Infrastructure Technology, LLC | 6196 |
144 |
| Pratt & Whitney Canada Corp. | 4629 |
131 |
| General Electric Company | 13830 |
121 |
| Siemens AG | 24547 |
79 |
| Rolls-Royce PLC | 3072 |
67 |
| United Technologies Corporation | 2247 |
64 |
| Siemens Energy Global GmbH & Co. KG | 2923 |
43 |
| Mitsubishi Power, Ltd. | 1758 |
41 |
| Rolls-Royce Corporation | 1727 |
37 |
| SNECMA S.A. | 1145 |
36 |
| Siemens Energy, Inc. | 1691 |
34 |
| Mitsubishi Heavy Industries, Ltd. | 8657 |
32 |
| Nuovo Pignone Tecnologie S.r.l. | 950 |
30 |
| MTU Aero Engines AG | 671 |
24 |
| Snecma | 1065 |
24 |
| Mitsubishi Hitachi Power Systems, Ltd. | 993 |
22 |
| Hamilton Sundstrand Corporation | 4834 |
20 |
| Rolls-Royce North American Technologies, Inc. | 1162 |
19 |
| Other owners | 506 |