- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 43/119 - Perforators; Permeators - Details, e.g. for locating perforating place or direction
Patent holdings for IPC class E21B 43/119
Total number of patents in this class: 766
10-year publication summary
48
|
40
|
42
|
45
|
78
|
75
|
82
|
95
|
62
|
16
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Halliburton Energy Services, Inc. | 20165 |
170 |
DYNAenergetics Europe GmbH | 205 |
56 |
Schlumberger Technology Corporation | 9690 |
51 |
Hunting Titan, Inc. | 240 |
50 |
Schlumberger Canada Limited | 6913 |
28 |
Schlumberger Technology B.v. | 4951 |
23 |
Geodynamics, Inc. | 203 |
23 |
Services Petroliers Schlumberger | 5426 |
23 |
ExxonMobil Upstream Research Company | 2525 |
22 |
Wells Fargo Bank, National Association | 2945 |
22 |
Saudi Arabian Oil Company | 11322 |
21 |
G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen | 61 |
16 |
Schlumberger Holdings Limited | 2947 |
13 |
Baker Hughes Incorporated | 5689 |
13 |
Owen Oil Tools LP | 101 |
13 |
Prad Research and Development Limited | 2696 |
11 |
Baker Hughes Holdings LLC | 3060 |
10 |
Dorf Ketal Chemicals FZE | 238 |
9 |
Thru Tubing Solutions, Inc. | 361 |
8 |
DYNAenergetics GmbH & Co. KG | 44 |
7 |
Other owners | 177 |