- All sections
- D - Textilespaper
- D21D - Treatment of the materials before passing to the paper-making machine
- D21D 5/26 - De-aeration of paper stock
Patent holdings for IPC class D21D 5/26
Total number of patents in this class: 36
10-year publication summary
|
2
|
0
|
6
|
1
|
3
|
0
|
1
|
0
|
0
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2758 |
14 |
| Andritz Oy | 282 |
6 |
| Valmet AB | 510 |
4 |
| Boe Technology Group Co., Ltd. | 41217 |
2 |
| Chengdu BOE Optoelectronics Technology Co., Ltd. | 6559 |
2 |
| Metso Paper, Inc. | 422 |
2 |
| Runtech Systems Oy | 23 |
2 |
| Aikawa Fiber Technologies Oy | 18 |
1 |
| POM Technology Oy AB | 2 |
1 |
| Sulzer Pumpen AG | 17 |
1 |
| Dr. W. Kolb AG | 4 |
1 |
| Other owners | 0 |