- 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 21/02 - Swivel joints in hose lines
Patent holdings for IPC class E21B 21/02
Total number of patents in this class: 93
10-year publication summary
|
11
|
11
|
12
|
9
|
5
|
9
|
3
|
4
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Weatherford Technology Holdings, LLC | 2009 |
10 |
| Halliburton Energy Services, Inc. | 20684 |
6 |
| National Oilwell Varco, L.P. | 1640 |
6 |
| Epiroc Rock Drills Aktiebolag | 489 |
5 |
| Atlas Copco Rock Drills AB | 152 |
4 |
| Sandbox Enterprises LLC | 136 |
4 |
| Boart Longyear Manufacturing and Distribution Inc. | 110 |
3 |
| Bauer Maschinen GmbH | 215 |
2 |
| Deublin Company | 45 |
2 |
| Forum US, Inc. | 330 |
2 |
| Frank's International, LLC | 237 |
2 |
| Mako Rentals, Inc. | 59 |
2 |
| Meccanotecnica Umbra S.p.A. | 25 |
2 |
| Nabors Drilling Technologies USA, Inc. | 556 |
2 |
| Tesco Corporation | 73 |
2 |
| Deublin Company, LLC | 31 |
2 |
| Caterpillar Inc. | 9417 |
1 |
| Chevron U.S.A. Inc. | 3912 |
1 |
| Aker Wirth GmbH | 19 |
1 |
| Aktiebolaget SKF | 2916 |
1 |
| Other owners | 33 |