- 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 43/1185 - Ignition systems
Patent holdings for IPC class E21B 43/1185
Total number of patents in this class: 783
10-year publication summary
|
41
|
47
|
58
|
95
|
65
|
98
|
87
|
58
|
69
|
24
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20621 |
130 |
| DYNAenergetics Europe GmbH | 242 |
85 |
| Hunting Titan, Inc. | 243 |
80 |
| Schlumberger Technology Corporation | 10495 |
52 |
| Geodynamics, Inc. | 189 |
44 |
| Schlumberger Canada Limited | 7142 |
31 |
| Owen Oil Tools LP | 90 |
28 |
| Wells Fargo Bank, National Association | 3706 |
28 |
| G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen | 67 |
26 |
| Services Petroliers Schlumberger | 5701 |
21 |
| Schlumberger Technology B.v. | 5115 |
20 |
| XConnect, LLC | 46 |
16 |
| Baker Hughes Incorporated | 5323 |
14 |
| Harrison Jet Guns II, L.P., Harrison Jet Guns Management Company, L.L.C., a Texas Limited Liability Company | 24 |
13 |
| DYNAenergetics GmbH & Co. KG | 40 |
11 |
| Expro Americas, LLC | 51 |
9 |
| GR Energy Services Management, LP | 42 |
9 |
| Baker Hughes Holdings LLC | 3022 |
8 |
| Weatherford Technology Holdings, LLC | 2007 |
6 |
| SWM International, LLC | 9 |
6 |
| Other owners | 146 |