- All sections
- E - Fixed constructions
- E21B - Earth or rock drillingobtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 41/04 - Manipulators for underwater operations, e.g. temporarily connected to well heads
Patent holdings for IPC class E21B 41/04
Total number of patents in this class: 272
10-year publication summary
|
30
|
22
|
28
|
29
|
24
|
17
|
13
|
7
|
13
|
9
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| OneSubsea IP UK Limited | 423 |
18 |
| Saudi Arabian Oil Company | 13409 |
15 |
| FMC Technologies, Inc. | 609 |
12 |
| Oceaneering International, Inc. | 426 |
12 |
| Schlumberger Technology Corporation | 10898 |
7 |
| Subsea 7 Limited | 221 |
6 |
| Trendsetter Vulcan Offshore, Inc. | 60 |
6 |
| Kinetic Pressure Control Limited | 84 |
6 |
| Halliburton Energy Services, Inc. | 20964 |
5 |
| Aker Solutions AS | 243 |
5 |
| BP Corporation North America Inc. | 749 |
5 |
| FMC Kongsberg Subsea AS | 186 |
5 |
| Trendsetter Engineering, Inc. | 53 |
5 |
| Hydril USA Distribution LLC | 213 |
4 |
| National Oilwell Varco, L.P. | 1689 |
4 |
| Baker Hughes Energy Technology UK Limited | 215 |
4 |
| TLA Subsea Ltd | 5 |
4 |
| TechnipFMC Norge AS | 85 |
4 |
| Aker Subsea AS | 128 |
3 |
| Bastion Technologies, Inc. | 27 |
3 |
| Other owners | 139 |