- All sections
- D - Textilespaper
- D21D - Treatment of the materials before passing to the paper-making machine
- D21D 1/30 - Disc mills
Patent holdings for IPC class D21D 1/30
Total number of patents in this class: 319
10-year publication summary
|
16
|
18
|
30
|
30
|
30
|
26
|
25
|
24
|
14
|
12
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Andritz Inc. | 324 |
52 |
| Valmet AB | 561 |
51 |
| Voith Patent GmbH | 2740 |
35 |
| Valmet Technologies Oy | 289 |
29 |
| International Paper Company | 596 |
16 |
| Metso Paper, Inc. | 329 |
13 |
| Valmet Technologies, Inc. | 134 |
9 |
| Aikawa Fiber Technologies Inc. | 19 |
9 |
| Andritz AG | 247 |
8 |
| Daprox AB | 15 |
6 |
| FPInnovations | 224 |
4 |
| Polycorp Ltd. | 66 |
4 |
| Aikawa Iron Works Co., Ltd. | 7 |
3 |
| Andritz Fiedler GmbH | 30 |
3 |
| Papyrus Australia Limited | 3 |
3 |
| University of Maine System Board of Trustees | 286 |
3 |
| Shaanxi University of Science & Technology | 61 |
3 |
| Suzano S.A. | 193 |
3 |
| Cellwood Machinery AB | 7 |
2 |
| CVP Clean Value Plastic GmbH | 2 |
2 |
| Other owners | 61 |