- 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 43/117 - Shaped-charge perforators
Patent holdings for IPC class E21B 43/117
Total number of patents in this class: 783
10-year publication summary
54
|
53
|
64
|
70
|
81
|
91
|
86
|
104
|
46
|
22
|
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 |
153 |
Hunting Titan, Inc. | 240 |
77 |
Schlumberger Technology Corporation | 9690 |
68 |
DYNAenergetics Europe GmbH | 205 |
67 |
Schlumberger Canada Limited | 6913 |
34 |
Geodynamics, Inc. | 203 |
34 |
Wells Fargo Bank, National Association | 2945 |
28 |
Owen Oil Tools LP | 101 |
24 |
Services Petroliers Schlumberger | 5426 |
22 |
Schlumberger Technology B.v. | 4951 |
21 |
G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen | 61 |
18 |
Baker Hughes Incorporated | 5689 |
14 |
DYNAenergetics GmbH & Co. KG | 44 |
12 |
Saudi Arabian Oil Company | 11322 |
12 |
QinetiQ Limited | 621 |
11 |
XConnect, LLC | 38 |
11 |
Schlumberger Holdings Limited | 2947 |
10 |
Prad Research and Development Limited | 2696 |
10 |
Harrison Jet Guns II, L.P., Harrison Jet Guns Management Company, L.L.C., a Texas Limited Liability Company | 15 |
9 |
Expro Americas, LLC | 38 |
8 |
Other owners | 140 |