- 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 10/36 - Percussion drill bits
Patent holdings for IPC class E21B 10/36
Total number of patents in this class: 376
10-year publication summary
|
19
|
18
|
19
|
13
|
25
|
16
|
13
|
16
|
18
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Smith International, Inc. | 718 |
36 |
| Baker Hughes Holdings LLC | 3007 |
35 |
| US Synthetic Corporation | 624 |
30 |
| Sandvik Intellectual Property AB | 1484 |
27 |
| Mincon International Limited | 54 |
19 |
| Sandvik Mining and Construction Tools AB | 174 |
18 |
| Epiroc Drilling Tools Aktiebolag | 82 |
11 |
| Center Rock Inc. | 45 |
10 |
| Mitsubishi Materials Corporation | 2442 |
9 |
| Sandvik Mining and Construction Oy | 826 |
8 |
| Baker Hughes Incorporated | 5252 |
7 |
| Schlumberger Technology Corporation | 10705 |
6 |
| Halliburton Energy Services, Inc. | 20879 |
6 |
| Hilti Aktiengesellschaft | 3496 |
5 |
| Kennametal Inc. | 1387 |
5 |
| Element Six Abrasives S.A. | 147 |
5 |
| Robit Plc | 34 |
5 |
| Varel International Ind., L.P. | 69 |
5 |
| DYWIDAG-Systems International GmbH | 12 |
4 |
| Epiroc Rock Drills Aktiebolag | 512 |
4 |
| Other owners | 121 |