- 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 19/20 - Combined feeding from rack and connecting, e.g. automatically
Patent holdings for IPC class E21B 19/20
Total number of patents in this class: 345
10-year publication summary
|
18
|
15
|
21
|
28
|
23
|
19
|
23
|
17
|
17
|
13
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Technology Corporation | 10949 |
28 |
| National Oilwell Varco, L.P. | 1686 |
23 |
| Sandvik Intellectual Property AB | 1472 |
14 |
| Epiroc Rock Drills Aktiebolag | 543 |
11 |
| Schlumberger Canada Limited | 7396 |
10 |
| Schlumberger Technology B.v. | 5201 |
10 |
| Nabors Drilling Technologies USA, Inc. | 562 |
10 |
| Services Petroliers Schlumberger | 5850 |
10 |
| Itrec B.V. | 503 |
8 |
| Vermeer Manufacturing Company | 642 |
7 |
| Helmerich & Payne Technologies, LLC | 104 |
7 |
| CCCC International Holding Limited | 13 |
7 |
| Caterpillar Global Mining Equipment LLC | 163 |
6 |
| Sandvik Mining and Construction Oy | 838 |
6 |
| Tracto-Technik GmbH & Co. KG | 170 |
6 |
| Epiroc Aktiebolag | 30 |
6 |
| Epiroc Drilling Solutions, LLC | 39 |
6 |
| Canrig Robotic Technologies AS | 54 |
6 |
| Atlas Copco Rock Drills AB | 141 |
5 |
| LaValley Industries, LLC | 68 |
5 |
| Other owners | 154 |