- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 15/12 - Combinations with mechanical gearing
Patent holdings for IPC class F01D 15/12
Total number of patents in this class: 522
10-year publication summary
|
90
|
71
|
72
|
45
|
54
|
44
|
37
|
35
|
33
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 9077 |
193 |
| General Electric Company | 17803 |
34 |
| Rolls-Royce PLC | 2981 |
31 |
| Pratt & Whitney Canada Corp. | 4434 |
28 |
| Safran Aircraft Engines | 6024 |
28 |
| Hamilton Sundstrand Corporation | 4719 |
18 |
| United Technologies Corporation | 2259 |
17 |
| Safran Transmission Systems | 276 |
17 |
| Rolls-Royce Deutschland Ltd & Co KG | 794 |
13 |
| Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | 427 |
9 |
| Rolls-Royce Corporation | 1719 |
8 |
| GE Avio S.r.l. | 242 |
7 |
| Nuovo Pignone Tecnologie S.r.l. | 852 |
7 |
| Rolls-Royce North American Technologies, Inc. | 1133 |
6 |
| GE Infrastructure Technology, LLC | 6109 |
5 |
| The Boeing Company | 19901 |
4 |
| Sanden Corporation | 920 |
4 |
| Unison Industries, LLC | 203 |
4 |
| Man Energy Solutions SE | 271 |
4 |
| Siemens AG | 24572 |
3 |
| Other owners | 82 |