- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01D - Non-positive-displacement machines or engines, e.g. steam turbines
- F01D 11/12 - Preventing or minimising internal leakage of working fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible, deformable or resiliently biased part
Patent holdings for IPC class F01D 11/12
Total number of patents in this class: 987
10-year publication summary
|
117
|
130
|
119
|
88
|
93
|
93
|
62
|
62
|
42
|
13
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 8674 |
242 |
| Safran Aircraft Engines | 5739 |
148 |
| General Electric Company | 18133 |
73 |
| Rolls-Royce Corporation | 1686 |
70 |
| Siemens AG | 24990 |
48 |
| Rolls-Royce PLC | 2944 |
35 |
| Rolls-Royce North American Technologies, Inc. | 1079 |
34 |
| GE Infrastructure Technology, LLC | 5873 |
29 |
| MTU Aero Engines AG | 622 |
28 |
| Pratt & Whitney Canada Corp. | 4215 |
23 |
| MTU Aero Engines GmbH | 565 |
20 |
| Siemens Energy, Inc. | 1770 |
19 |
| Safran Aero Boosters SA | 180 |
15 |
| Siemens Energy Global GmbH & Co. KG | 2775 |
15 |
| SNECMA S.A. | 1160 |
11 |
| Nuovo Pignone Tecnologie S.r.l. | 789 |
11 |
| Centre National de La Recherche Scientifique | 9632 |
9 |
| Universite Paul Sabatier Toulouse III | 473 |
9 |
| Mitsubishi Heavy Industries Aero Engines, Ltd. | 121 |
8 |
| Safran Helicopter Engines | 676 |
8 |
| Other owners | 132 |