- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 1/50 - Suction boxes with rolls
Patent holdings for IPC class D21F 1/50
Total number of patents in this class: 17
10-year publication summary
|
1
|
0
|
1
|
0
|
0
|
1
|
0
|
0
|
2
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Effcom Oy | 8 |
5 |
| Voith Patent GmbH | 2764 |
5 |
| Stowe Woodward Licensco, LLC | 52 |
4 |
| AstenJohnson, Inc. | 128 |
1 |
| Valmet AB | 511 |
1 |
| Mempro Ltd. | 3 |
1 |
| Other owners | 0 |