- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 21/00 - Shutting-down of machines or engines, e.g. in emergencyRegulating, controlling, or safety means not otherwise provided for
Patent holdings for IPC class F01D 21/00
Total number of patents in this class: 1830
10-year publication summary
|
187
|
227
|
143
|
111
|
118
|
97
|
97
|
129
|
127
|
77
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 10082 |
267 |
| General Electric Company | 13888 |
162 |
| Pratt & Whitney Canada Corp. | 5472 |
137 |
| Safran Aircraft Engines | 6671 |
120 |
| GE Infrastructure Technology, LLC | 6171 |
119 |
| Rolls-Royce PLC | 3219 |
95 |
| Siemens Energy, Inc. | 1685 |
68 |
| Siemens AG | 24033 |
61 |
| Mitsubishi Heavy Industries, Ltd. | 9115 |
42 |
| Rolls-Royce Corporation | 1676 |
36 |
| Safran Helicopter Engines | 840 |
30 |
| Mitsubishi Power, Ltd. | 1832 |
29 |
| Siemens Energy Global GmbH & Co. KG | 3335 |
26 |
| Rolls-Royce North American Technologies, Inc. | 1127 |
20 |
| SNECMA S.A. | 1146 |
19 |
| Hamilton Sundstrand Corporation | 5016 |
19 |
| Rolls-Royce Deutschland Ltd & Co KG | 857 |
19 |
| Snecma | 1058 |
19 |
| Honeywell International Inc. | 12778 |
15 |
| MTU Aero Engines AG | 725 |
15 |
| Other owners | 512 |