- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F04D - Non-positive-displacement pumps
- F04D 29/68 - Combating cavitation, whirls, noise, vibration, or the likeBalancing by influencing boundary layers
Patent holdings for IPC class F04D 29/68
Total number of patents in this class: 588
10-year publication summary
|
67
|
44
|
59
|
57
|
36
|
27
|
28
|
28
|
25
|
13
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Safran Aircraft Engines | 6294 |
43 |
| Pratt & Whitney Canada Corp. | 4793 |
26 |
| IHI Corporation | 3450 |
19 |
| Rtx Corporation | 9410 |
17 |
| Snecma | 1064 |
14 |
| SNECMA S.A. | 1148 |
13 |
| Mitsubishi Heavy Industries, Ltd. | 8752 |
13 |
| Rolls-Royce Corporation | 1739 |
13 |
| General Electric Company | 13810 |
12 |
| Honeywell International Inc. | 13540 |
12 |
| Robert Bosch GmbH | 42705 |
12 |
| BorgWarner Inc. | 2599 |
12 |
| MTU Aero Engines GmbH | 502 |
11 |
| Siemens AG | 24453 |
10 |
| Rolls-Royce PLC | 3107 |
10 |
| Rolls-Royce North American Technologies, Inc. | 1169 |
10 |
| Rolls-Royce Deutschland Ltd & Co KG | 817 |
9 |
| Safran Aero Boosters SA | 183 |
9 |
| Mitsubishi Electric Corporation | 46197 |
8 |
| Carrier Corporation | 4296 |
8 |
| Other owners | 307 |