- All sections
- D - Textilespaper
- D21D - Treatment of the materials before passing to the paper-making machine
- D21D 5/02 - Straining or screening the pulp
Patent holdings for IPC class D21D 5/02
Total number of patents in this class: 134
10-year publication summary
|
11
|
5
|
4
|
10
|
10
|
5
|
7
|
11
|
6
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2754 |
36 |
| Andritz Oy | 282 |
6 |
| Seiko Epson Corporation | 19281 |
5 |
| Metsa Board Oyj | 53 |
5 |
| Stora Enso Oyj | 1616 |
5 |
| Valmet AB | 500 |
5 |
| Valmet Technologies Oy | 287 |
5 |
| Kadant Black Clawson LLC | 38 |
4 |
| The Procter & Gamble Company | 22050 |
3 |
| Andritz Fiedler GmbH | 28 |
3 |
| Metso Paper, Inc. | 428 |
3 |
| Advanced Fiber Technologies (aft) Trust | 3 |
2 |
| Aikawa Fiber Technologies Trust | 9 |
2 |
| Andritz AG | 231 |
2 |
| M-real Oyj | 30 |
2 |
| MeadWestvaco Corporation | 341 |
2 |
| Uniboard Canada Inc. | 72 |
2 |
| GPCP IP Holdings LLC | 1642 |
2 |
| Red Wire Oy | 5 |
2 |
| Aikawa Fiber Technologies Inc. | 16 |
2 |
| Other owners | 36 |