- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 1/54 - Skimming devices, e.g. froth ledges
Patent holdings for IPC class D21F 1/54
Total number of patents in this class: 5
10-year publication summary
|
4
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Valmet Technologies, Inc. | 146 |
2 |
| Coldwater Seals, Inc. | 5 |
2 |
| Valmet Technologies, Inc. | 1 |
1 |
| Other owners | 0 |