- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 25/12 - Cooling
Patent holdings for IPC class F01D 25/12
Total number of patents in this class: 2714
10-year publication summary
|
379
|
363
|
315
|
259
|
226
|
168
|
135
|
116
|
90
|
87
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 9601 |
682 |
| General Electric Company | 13830 |
271 |
| GE Infrastructure Technology, LLC | 6197 |
203 |
| United Technologies Corporation | 2233 |
152 |
| Safran Aircraft Engines | 6410 |
147 |
| Pratt & Whitney Canada Corp. | 4958 |
143 |
| Rolls-Royce Corporation | 1753 |
71 |
| Rolls-Royce North American Technologies, Inc. | 1177 |
66 |
| Siemens AG | 24333 |
60 |
| Mitsubishi Heavy Industries, Ltd. | 8900 |
60 |
| Rolls-Royce PLC | 3159 |
60 |
| Siemens Energy Global GmbH & Co. KG | 3090 |
57 |
| Mitsubishi Power, Ltd. | 1809 |
48 |
| Mitsubishi Hitachi Power Systems, Ltd. | 991 |
32 |
| Hamilton Sundstrand Corporation | 4956 |
29 |
| Siemens Energy, Inc. | 1703 |
29 |
| SNECMA S.A. | 1148 |
28 |
| Doosan Heavy Industries & Construction Co., Ltd. | 580 |
28 |
| Ansaldo Energia Switzerland AG | 273 |
23 |
| Honeywell International Inc. | 13571 |
22 |
| Other owners | 503 |