- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F04D - Non-positive-displacement pumps
- F04D 29/044 - Arrangements for joining or assembling shafts
Patent holdings for IPC class F04D 29/044
Total number of patents in this class: 140
10-year publication summary
|
12
|
17
|
12
|
14
|
8
|
10
|
15
|
9
|
6
|
10
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21338 |
9 |
| Baker Hughes Oilfield Operations, LLC | 2527 |
8 |
| Schlumberger Technology Corporation | 11818 |
5 |
| US Well Services LLC | 225 |
5 |
| Mitsubishi Heavy Industries Compressor Corporation | 640 |
4 |
| Schlumberger Canada Limited | 7606 |
3 |
| Schlumberger Technology B.v. | 5298 |
3 |
| GREE Electric Appliances, Inc. of Zhuhai | 3316 |
3 |
| ITT Manufacturing Enterprises LLC | 420 |
3 |
| KSB Aktiengesellschaft | 154 |
3 |
| Services Petroliers Schlumberger | 6024 |
3 |
| Grundfos Holding A/S | 606 |
3 |
| KSB SE & Co. KGaA | 736 |
3 |
| LG Electronics Inc. | 75694 |
2 |
| Robert Bosch GmbH | 44160 |
2 |
| Ebara Corporation | 2323 |
2 |
| Aisan Kogyo Kabushiki Kaisha | 768 |
2 |
| Asia Vital Components Co., Ltd. | 432 |
2 |
| Ecotech, Inc. | 11 |
2 |
| Forum US, Inc. | 346 |
2 |
| Other owners | 71 |