- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F04D - Non-positive-displacement pumps
- F04D 29/04 - Shafts or bearings, or assemblies thereof
Patent holdings for IPC class F04D 29/04
Total number of patents in this class: 269
10-year publication summary
|
17
|
10
|
23
|
15
|
15
|
13
|
8
|
19
|
7
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20419 |
18 |
| Schlumberger Canada Limited | 7147 |
7 |
| Schlumberger Technology Corporation | 10241 |
6 |
| Schlumberger Technology B.v. | 5068 |
6 |
| Edwards Limited | 799 |
6 |
| IHI Corporation | 3358 |
6 |
| Safran Aircraft Engines | 6031 |
6 |
| Services Petroliers Schlumberger | 5626 |
6 |
| Baker Hughes Incorporated | 5508 |
5 |
| JPMorgan Chase Bank, National Association | 8409 |
5 |
| Schlumberger Holdings Limited | 2867 |
4 |
| GE Oil & Gas ESP, Inc. | 82 |
4 |
| GE Infrastructure Technology, LLC | 6114 |
4 |
| Baker Hughes Oilfield Operations, LLC | 2120 |
4 |
| Baker Hughes, a GE Company, LLC | 2138 |
4 |
| Baker Hughes Holdings LLC | 3009 |
4 |
| Rtx Corporation | 9094 |
4 |
| General Electric Company | 17783 |
3 |
| BorgWarner Inc. | 2587 |
3 |
| Prad Research and Development Limited | 2696 |
3 |
| Other owners | 161 |