- All sections
- D - Textilespaper
- D21D - Treatment of the materials before passing to the paper-making machine
- D21D 1/00 - Methods of beating or refiningBeaters of the Hollander type
Patent holdings for IPC class D21D 1/00
Total number of patents in this class: 134
10-year publication summary
|
6
|
6
|
9
|
15
|
14
|
16
|
7
|
9
|
9
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2756 |
16 |
| Andritz Inc. | 332 |
14 |
| International Paper Company | 789 |
13 |
| Stora Enso Oyj | 1636 |
8 |
| Fiberlean Technologies Limited | 114 |
7 |
| Valmet Technologies Oy | 287 |
6 |
| Domtar Paper Company, LLC | 121 |
4 |
| FPInnovations | 244 |
4 |
| UPM-Kymmene Corporation | 937 |
4 |
| Valmet AB | 505 |
3 |
| Valmet Technologies, Inc. | 147 |
3 |
| ABB Research Ltd. | 887 |
2 |
| Aikawa Iron Works Co., Ltd. | 7 |
2 |
| Andritz Fiedler GmbH | 28 |
2 |
| Buckman Laboratories International, Inc. | 237 |
2 |
| Kadant Lamort | 23 |
2 |
| Philippe Saint GER AG | 9 |
2 |
| Polycorp Ltd. | 67 |
2 |
| The University of British Columbia | 1499 |
2 |
| WestRock MWV, LLC | 340 |
2 |
| Other owners | 34 |