- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 1/74 - Pulp catching, de-watering, or recoveringRe-use of pulp-water using cylinders
Patent holdings for IPC class D21F 1/74
Total number of patents in this class: 9
10-year publication summary
|
0
|
0
|
0
|
1
|
1
|
1
|
1
|
0
|
1
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Andritz Oy | 288 |
4 |
| Seiko Epson Corporation | 20081 |
1 |
| Andritz Inc. | 324 |
1 |
| Andritz Separation Inc. | 13 |
1 |
| Stora Enso Oyj | 1635 |
1 |
| Valmet AB | 541 |
1 |
| Other owners | 0 |