- All sections
- D - Textilespaper
- D21H - Pulp compositionspreparation thereof not covered by subclasses , impregnating or coating of papertreatment of finished paper not covered by class or subclass paper not otherwise provided for
- D21H 23/34 - Knife or blade type coaters
Patent holdings for IPC class D21H 23/34
Total number of patents in this class: 42
10-year publication summary
|
5
|
4
|
4
|
5
|
1
|
4
|
1
|
5
|
1
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| WestRock MWV, LLC | 338 |
11 |
| Metso Paper, Inc. | 415 |
6 |
| Voith Patent GmbH | 2775 |
6 |
| Nippon Paper Industries Co., Ltd. | 835 |
3 |
| BTG Eclepens S.A. | 25 |
2 |
| Paptic Oy | 29 |
2 |
| Merck Patent GmbH | 5764 |
1 |
| OrganoClick AB | 72 |
1 |
| PA Knowledge Limited | 55 |
1 |
| Stora Enso Oyj | 1660 |
1 |
| Swedev AB | 12 |
1 |
| Swiss Krono Tec AG | 492 |
1 |
| UPM-Kymmene Corporation | 945 |
1 |
| Valmet Technologies, Inc. | 144 |
1 |
| Valmet Technologies Oy | 287 |
1 |
| Ahlstrom-munksjo Oyj | 221 |
1 |
| Ike-service Oy | 1 |
1 |
| Zhejiang Jinlong Paper Co., Ltd | 1 |
1 |
| Other owners | 0 |