- All sections
- E - Fixed constructions
- E03B - Installations or methods for obtaining, collecting, or distributing water
- E03B 3/18 - Well filters
Patent holdings for IPC class E03B 3/18
Total number of patents in this class: 55
10-year publication summary
|
2
|
1
|
4
|
4
|
3
|
2
|
0
|
1
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Baker Hughes Incorporated | 5175 |
10 |
| Halliburton Energy Services, Inc. | 21078 |
10 |
| Parkson Corporation | 126 |
6 |
| Schlumberger Technology Corporation | 11054 |
2 |
| Schlumberger Canada Limited | 7432 |
1 |
| Schlumberger Technology B.v. | 5223 |
1 |
| Schlumberger Holdings Limited | 2790 |
1 |
| 3m Innovative Properties Company | 17730 |
1 |
| Hamilton Sundstrand Corporation | 4954 |
1 |
| Chevron U.S.A. Inc. | 4018 |
1 |
| JTEKT Corporation | 2527 |
1 |
| Weatherford Technology Holdings, LLC | 2033 |
1 |
| Aramco Services Company | 4095 |
1 |
| Beijing Hinen-Hitech Petroleum Technology Development Co., Ltd | 1 |
1 |
| C & K Prodiesel Development, LLC | 1 |
1 |
| Composite Technology Development, Inc. | 31 |
1 |
| Framo Engineering AS | 58 |
1 |
| HUSCO Automotive Holdings LLC | 58 |
1 |
| Orbital Systems AB | 84 |
1 |
| Ove ARUP & Partners International Limited | 12 |
1 |
| Other owners | 11 |