- 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 19/083 - Cam, rack or like feed mechanisms
Patent holdings for IPC class E21B 19/083
Total number of patents in this class: 75
10-year publication summary
|
10
|
7
|
4
|
6
|
3
|
7
|
2
|
8
|
2
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nabors Drilling Technologies USA, Inc. | 575 |
8 |
| Vermeer Manufacturing Company | 667 |
8 |
| Schlumberger Technology Corporation | 11584 |
5 |
| The Charles Machine Works, Inc. | 416 |
4 |
| Roddie, Inc. | 33 |
4 |
| Schlumberger Canada Limited | 7588 |
3 |
| Schlumberger Technology B.v. | 5282 |
3 |
| Ensco Services Limited | 8 |
3 |
| Foremost Industries LP | 3 |
3 |
| LaValley Industries, LLC | 70 |
3 |
| Services Petroliers Schlumberger | 5996 |
3 |
| Prostar Energy Technologies (USA) LLC | 14 |
3 |
| Ensco International Incorporated | 56 |
2 |
| Tracto-Technik GmbH & Co. KG | 170 |
2 |
| Joy Global Surface Mining Inc | 371 |
2 |
| Schlumberger Holdings Limited | 2724 |
1 |
| Smith International, Inc. | 698 |
1 |
| Altus Intervention AS | 19 |
1 |
| Caterpillar Global Mining Equipment LLC | 174 |
1 |
| Consolidated Rig Works L.P. | 10 |
1 |
| Other owners | 14 |