- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 21/04 - Shutting-down of machines or engines, e.g. in emergencyRegulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator, e.g. indicating such position
Patent holdings for IPC class F01D 21/04
Total number of patents in this class: 637
10-year publication summary
|
79
|
55
|
64
|
47
|
59
|
40
|
32
|
34
|
21
|
13
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Safran Aircraft Engines | 6265 |
90 |
| Rtx Corporation | 9325 |
90 |
| General Electric Company | 13829 |
71 |
| Pratt & Whitney Canada Corp. | 4700 |
52 |
| Rolls-Royce PLC | 3073 |
47 |
| Rolls-Royce Corporation | 1727 |
26 |
| SNECMA S.A. | 1145 |
21 |
| Snecma | 1064 |
20 |
| Rolls-Royce Deutschland Ltd & Co KG | 812 |
11 |
| Rolls-Royce North American Technologies, Inc. | 1161 |
10 |
| Hamilton Sundstrand Corporation | 4844 |
9 |
| MTU Aero Engines GmbH | 508 |
9 |
| Safran Helicopter Engines | 754 |
9 |
| Siemens AG | 24525 |
8 |
| The Boeing Company | 20031 |
8 |
| GE Infrastructure Technology, LLC | 6209 |
8 |
| Honeywell International Inc. | 13522 |
7 |
| ABB Turbo Systems AG | 95 |
6 |
| Albany Engineered Composites, Inc. | 155 |
6 |
| MTU Aero Engines AG | 672 |
6 |
| Other owners | 123 |