- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 21/12 - Shutting-down of machines or engines, e.g. in emergency; Regulating, 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: 128
10-year publication summary
|
13
|
8
|
9
|
22
|
14
|
14
|
13
|
12
|
9
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| GE Infrastructure Technology, LLC | 5873 |
11 |
| Siemens AG | 24990 |
10 |
| Pratt & Whitney Canada Corp. | 4215 |
10 |
| General Electric Company | 18133 |
9 |
| Safran Aircraft Engines | 5739 |
9 |
| Mitsubishi Power, Ltd. | 1680 |
6 |
| Mitsubishi Heavy Industries, Ltd. | 8217 |
5 |
| Rtx Corporation | 8674 |
5 |
| Hamilton Sundstrand Corporation | 4525 |
4 |
| Rolls-Royce Corporation | 1686 |
4 |
| Rolls-Royce PLC | 2944 |
3 |
| Safran Helicopter Engines | 676 |
3 |
| The Boeing Company | 19843 |
2 |
| Honeywell International Inc. | 13799 |
2 |
| Siemens Energy, Inc. | 1770 |
2 |
| Ansaldo Energia Switzerland AG | 293 |
2 |
| China General Nuclear Power Corporation | 244 |
2 |
| Emerson Process Management Power & Water Solutions, Inc. | 126 |
2 |
| Fluid Equipment Development Company, LLC | 84 |
2 |
| General Electric Technology GmbH | 1657 |
2 |
| Other owners | 33 |