- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 11/08 - Preventing or minimising internal leakage of working fluid, e.g. between stages for sealing space between rotor blade tips and stator
Patent holdings for IPC class F01D 11/08
Total number of patents in this class: 1394
10-year publication summary
|
119
|
224
|
165
|
126
|
124
|
143
|
98
|
57
|
45
|
11
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 8674 |
410 |
| Rolls-Royce Corporation | 1686 |
117 |
| General Electric Company | 18133 |
102 |
| Safran Aircraft Engines | 5739 |
92 |
| Rolls-Royce North American Technologies, Inc. | 1079 |
73 |
| GE Infrastructure Technology, LLC | 5873 |
68 |
| United Technologies Corporation | 2328 |
58 |
| Pratt & Whitney Canada Corp. | 4215 |
42 |
| Rolls-Royce PLC | 2944 |
40 |
| Mitsubishi Heavy Industries, Ltd. | 8217 |
37 |
| Siemens AG | 24990 |
35 |
| Mitsubishi Hitachi Power Systems, Ltd. | 999 |
31 |
| Mitsubishi Power, Ltd. | 1680 |
27 |
| Rolls-Royce High Temperature Composites, Inc. | 129 |
20 |
| MTU Aero Engines AG | 622 |
17 |
| Siemens Energy, Inc. | 1770 |
15 |
| Siemens Energy Global GmbH & Co. KG | 2775 |
15 |
| Safran Ceramics | 366 |
14 |
| Honeywell International Inc. | 13799 |
11 |
| IHI Corporation | 3268 |
10 |
| Other owners | 160 |