- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 21/04 - Shutting-down of machines or engines, e.g. in emergency; Regulating, 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: 621
10-year publication summary
|
79
|
55
|
64
|
47
|
59
|
40
|
32
|
33
|
18
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 9109 |
90 |
| Safran Aircraft Engines | 6039 |
86 |
| General Electric Company | 17789 |
71 |
| Rolls-Royce PLC | 2989 |
47 |
| Pratt & Whitney Canada Corp. | 4442 |
46 |
| Rolls-Royce Corporation | 1719 |
25 |
| SNECMA S.A. | 1150 |
21 |
| Snecma | 1065 |
20 |
| Rolls-Royce Deutschland Ltd & Co KG | 797 |
11 |
| Rolls-Royce North American Technologies, Inc. | 1133 |
10 |
| Hamilton Sundstrand Corporation | 4728 |
9 |
| MTU Aero Engines GmbH | 519 |
9 |
| Siemens AG | 24565 |
8 |
| The Boeing Company | 19911 |
8 |
| Safran Helicopter Engines | 725 |
8 |
| GE Infrastructure Technology, LLC | 6114 |
8 |
| Honeywell International Inc. | 14021 |
7 |
| ABB Turbo Systems AG | 101 |
6 |
| Albany Engineered Composites, Inc. | 154 |
6 |
| MTU Aero Engines AG | 654 |
6 |
| Other owners | 119 |