- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 25/26 - Double casings; Measures against temperature strain in casings
Patent holdings for IPC class F01D 25/26
Total number of patents in this class: 580
10-year publication summary
|
48
|
80
|
51
|
57
|
59
|
45
|
34
|
21
|
15
|
8
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 8674 |
62 |
| Siemens AG | 24990 |
57 |
| General Electric Company | 18133 |
40 |
| GE Infrastructure Technology, LLC | 5873 |
29 |
| Mitsubishi Heavy Industries, Ltd. | 8217 |
24 |
| Pratt & Whitney Canada Corp. | 4215 |
24 |
| Safran Aircraft Engines | 5739 |
24 |
| Mitsubishi Power, Ltd. | 1680 |
24 |
| Siemens Energy Global GmbH & Co. KG | 2775 |
17 |
| The Boeing Company | 19843 |
13 |
| General Electric Technology GmbH | 1657 |
12 |
| Toshiba Energy Systems & Solutions Corp. | 954 |
12 |
| Mitsubishi Hitachi Power Systems, Ltd. | 999 |
11 |
| Rolls-Royce North American Technologies, Inc. | 1079 |
11 |
| Rohr, Inc. | 653 |
10 |
| Ansaldo Energia Switzerland AG | 293 |
9 |
| MTU Aero Engines AG | 622 |
9 |
| Rolls-Royce PLC | 2944 |
8 |
| Siemens Energy, Inc. | 1770 |
8 |
| Doosan Heavy Industries & Construction Co., Ltd. | 604 |
8 |
| Other owners | 168 |