- All sections
- E - Fixed constructions
- E03B - Installations or methods for obtaining, collecting, or distributing water
- E03B 3/26 - Well filters formed of loose materials, e.g. gravel with packed filtering material
Patent holdings for IPC class E03B 3/26
Total number of patents in this class: 4
10-year publication summary
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Baker Hughes Incorporated | 5041 |
1 |
| Beijing Rechsand Science & Technology Group Co., Ltd. | 36 |
1 |
| HOBAS Engineering GmbH | 4 |
1 |
| Visser & SMIT Hanab BV | 2 |
1 |
| Other owners | 0 |