- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- 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: 2596
10-year publication summary
262
|
408
|
469
|
328
|
275
|
246
|
177
|
145
|
119
|
38
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Rtx Corporation | 8674 |
652 |
General Electric Company | 18133 |
262 |
GE Infrastructure Technology, LLC | 5873 |
202 |
United Technologies Corporation | 2328 |
154 |
Pratt & Whitney Canada Corp. | 4215 |
137 |
Safran Aircraft Engines | 5739 |
131 |
Rolls-Royce Corporation | 1686 |
71 |
Rolls-Royce North American Technologies, Inc. | 1079 |
67 |
Siemens AG | 24990 |
64 |
Rolls-Royce PLC | 2944 |
58 |
Siemens Energy Global GmbH & Co. KG | 2775 |
56 |
Mitsubishi Heavy Industries, Ltd. | 8217 |
51 |
Mitsubishi Power, Ltd. | 1680 |
43 |
Mitsubishi Hitachi Power Systems, Ltd. | 999 |
32 |
Siemens Energy, Inc. | 1770 |
30 |
SNECMA S.A. | 1160 |
28 |
Doosan Heavy Industries & Construction Co., Ltd. | 604 |
28 |
Hamilton Sundstrand Corporation | 4525 |
27 |
Ansaldo Energia Switzerland AG | 293 |
23 |
Honeywell International Inc. | 13799 |
22 |
Other owners | 458 |