- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 5/28 - Selecting particular materialsMeasures against erosion or corrosion
Patent holdings for IPC class F01D 5/28
Total number of patents in this class: 4297
10-year publication summary
|
489
|
344
|
364
|
354
|
332
|
294
|
199
|
221
|
181
|
187
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 9596 |
699 |
| General Electric Company | 13840 |
498 |
| Safran Aircraft Engines | 6404 |
479 |
| Siemens AG | 24333 |
219 |
| Rolls-Royce Corporation | 1752 |
188 |
| GE Infrastructure Technology, LLC | 6190 |
186 |
| Rolls-Royce PLC | 3140 |
147 |
| Rolls-Royce North American Technologies, Inc. | 1176 |
102 |
| Safran Ceramics | 419 |
86 |
| SAFRAN S.A. | 630 |
81 |
| SNECMA S.A. | 1148 |
76 |
| Snecma | 1064 |
67 |
| Siemens Energy Global GmbH & Co. KG | 3081 |
63 |
| IHI Corporation | 3467 |
59 |
| Siemens Energy, Inc. | 1703 |
58 |
| Mitsubishi Heavy Industries, Ltd. | 8875 |
55 |
| Pratt & Whitney Canada Corp. | 4896 |
55 |
| Honeywell International Inc. | 13568 |
48 |
| Centre National de La Recherche Scientifique | 10693 |
46 |
| Herakles | 157 |
42 |
| Other owners | 1043 |