- 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: 686
10-year publication summary
|
55
|
64
|
47
|
59
|
40
|
32
|
34
|
27
|
41
|
20
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Safran Aircraft Engines | 6671 |
107 |
| Rtx Corporation | 10082 |
95 |
| General Electric Company | 13888 |
73 |
| Pratt & Whitney Canada Corp. | 5472 |
68 |
| Rolls-Royce PLC | 3219 |
48 |
| Rolls-Royce Corporation | 1676 |
27 |
| SNECMA S.A. | 1146 |
21 |
| Snecma | 1058 |
20 |
| Rolls-Royce North American Technologies, Inc. | 1127 |
11 |
| Safran Helicopter Engines | 840 |
11 |
| Rolls-Royce Deutschland Ltd & Co KG | 857 |
10 |
| Hamilton Sundstrand Corporation | 5016 |
9 |
| Siemens AG | 24033 |
8 |
| The Boeing Company | 20160 |
8 |
| Honeywell International Inc. | 12778 |
8 |
| GE Infrastructure Technology, LLC | 6171 |
8 |
| MTU Aero Engines GmbH | 421 |
7 |
| Airbus Operations S.A.S. | 2554 |
6 |
| ABB Turbo Systems AG | 87 |
6 |
| Albany Engineered Composites, Inc. | 149 |
6 |
| Other owners | 129 |