- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 21/02 - Shutting-down responsive to overspeed
Patent holdings for IPC class F01D 21/02
Total number of patents in this class: 155
10-year publication summary
|
18
|
19
|
16
|
23
|
11
|
12
|
16
|
9
|
3
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Pratt & Whitney Canada Corp. | 4215 |
16 |
| Siemens AG | 24990 |
11 |
| Safran Aircraft Engines | 5739 |
9 |
| Safran Helicopter Engines | 676 |
9 |
| GE Infrastructure Technology, LLC | 5873 |
8 |
| ABB Schweiz AG | 6321 |
7 |
| Rtx Corporation | 8674 |
7 |
| General Electric Company | 18133 |
6 |
| Airbus Helicopters | 984 |
6 |
| Rolls-Royce PLC | 2944 |
5 |
| Hamilton Sundstrand Corporation | 4525 |
4 |
| General Electric Technology GmbH | 1657 |
4 |
| Turbomeca | 232 |
4 |
| SNECMA S.A. | 1160 |
3 |
| Honeywell International Inc. | 13799 |
3 |
| Rolls-Royce North American Technologies, Inc. | 1079 |
3 |
| Safran Electronics & Defense | 1130 |
3 |
| Solar Turbines Incorporated | 452 |
3 |
| China Shenhua Energy Company Limited | 24 |
2 |
| Microturbo | 28 |
2 |
| Other owners | 40 |