- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 21/12 - Shutting-down of machines or engines, e.g. in emergencyRegulating, controlling, or safety means not otherwise provided for responsive to temperature
Patent holdings for IPC class F01D 21/12
Total number of patents in this class: 141
10-year publication summary
|
9
|
22
|
14
|
14
|
13
|
13
|
10
|
9
|
6
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| GE Infrastructure Technology, LLC | 6159 |
14 |
| Pratt & Whitney Canada Corp. | 5517 |
12 |
| Safran Aircraft Engines | 6727 |
12 |
| Siemens AG | 23996 |
10 |
| General Electric Company | 13915 |
9 |
| Mitsubishi Heavy Industries, Ltd. | 9168 |
7 |
| Rolls-Royce PLC | 3224 |
6 |
| Mitsubishi Power, Ltd. | 1833 |
6 |
| Rtx Corporation | 10127 |
5 |
| Hamilton Sundstrand Corporation | 5014 |
4 |
| General Electric Technology GmbH | 1336 |
4 |
| Rolls-Royce Corporation | 1680 |
4 |
| Safran Helicopter Engines | 847 |
3 |
| The Boeing Company | 20186 |
2 |
| Siemens Energy, Inc. | 1686 |
2 |
| Ansaldo Energia Switzerland AG | 270 |
2 |
| China General Nuclear Power Corporation | 286 |
2 |
| Emerson Process Management Power & Water Solutions, Inc. | 117 |
2 |
| Fluid Equipment Development Company, LLC | 89 |
2 |
| Rolls-Royce North American Technologies, Inc. | 1130 |
2 |
| Other owners | 31 |