- All sections
- D - Textiles; paper
- D21D - Treatment of the materials before passing to the paper-making machine
- D21D 1/38 - Other mills or refiners with horizontal shaft
Patent holdings for IPC class D21D 1/38
Total number of patents in this class: 11
10-year publication summary
|
1
|
0
|
0
|
1
|
0
|
0
|
0
|
0
|
4
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Aikawa Iron Works Co., Ltd. | 7 |
2 |
| Voith Patent GmbH | 2734 |
2 |
| Seiko Epson Corporation | 18966 |
1 |
| Agrotechnology and Food Innovations B.V. | 3 |
1 |
| Centre Technique du Papier | 18 |
1 |
| Interface International B.V. | 29 |
1 |
| Metso Paper, Inc. | 481 |
1 |
| Valmet Technologies Oy | 290 |
1 |
| Zelfo Technology GmbH | 6 |
1 |
| Other owners | 0 |