- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 25/26 - Double casingsMeasures against temperature strain in casings
Patent holdings for IPC class F01D 25/26
Total number of patents in this class: 596
10-year publication summary
|
80
|
51
|
57
|
59
|
45
|
34
|
22
|
16
|
23
|
10
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 9332 |
63 |
| Siemens AG | 24520 |
56 |
| General Electric Company | 13811 |
39 |
| GE Infrastructure Technology, LLC | 6212 |
31 |
| Mitsubishi Heavy Industries, Ltd. | 8694 |
28 |
| Safran Aircraft Engines | 6270 |
26 |
| Pratt & Whitney Canada Corp. | 4716 |
25 |
| Mitsubishi Power, Ltd. | 1759 |
25 |
| Siemens Energy Global GmbH & Co. KG | 2941 |
16 |
| The Boeing Company | 20042 |
13 |
| Toshiba Energy Systems & Solutions Corp. | 1076 |
12 |
| Mitsubishi Hitachi Power Systems, Ltd. | 993 |
11 |
| Rolls-Royce North American Technologies, Inc. | 1161 |
11 |
| Nuovo Pignone Tecnologie S.r.l. | 959 |
11 |
| Rohr, Inc. | 752 |
10 |
| Ansaldo Energia Switzerland AG | 278 |
9 |
| Rolls-Royce PLC | 3085 |
8 |
| Siemens Energy, Inc. | 1689 |
8 |
| Doosan Heavy Industries & Construction Co., Ltd. | 581 |
8 |
| MTU Aero Engines AG | 672 |
8 |
| Other owners | 178 |