- 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: 2700
10-year publication summary
|
379
|
363
|
315
|
259
|
226
|
168
|
135
|
116
|
89
|
70
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 9461 |
675 |
| General Electric Company | 13858 |
270 |
| GE Infrastructure Technology, LLC | 6250 |
202 |
| United Technologies Corporation | 2241 |
152 |
| Safran Aircraft Engines | 6316 |
147 |
| Pratt & Whitney Canada Corp. | 4834 |
140 |
| Rolls-Royce Corporation | 1760 |
72 |
| Rolls-Royce North American Technologies, Inc. | 1170 |
68 |
| Rolls-Royce PLC | 3134 |
61 |
| Siemens AG | 24352 |
60 |
| Mitsubishi Heavy Industries, Ltd. | 8803 |
59 |
| Siemens Energy Global GmbH & Co. KG | 3026 |
57 |
| Mitsubishi Power, Ltd. | 1788 |
47 |
| Mitsubishi Hitachi Power Systems, Ltd. | 993 |
32 |
| Hamilton Sundstrand Corporation | 4923 |
29 |
| Siemens Energy, Inc. | 1708 |
29 |
| SNECMA S.A. | 1148 |
28 |
| Doosan Heavy Industries & Construction Co., Ltd. | 580 |
28 |
| Ansaldo Energia Switzerland AG | 273 |
23 |
| Honeywell International Inc. | 13561 |
22 |
| Other owners | 499 |