- 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: 18
10-year publication summary
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0
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2
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0
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0
|
1
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0
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0
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2
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3
|
1
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Stowe Woodward Licensco, LLC | 51 |
6 |
| Voith Patent GmbH | 2743 |
5 |
| Effcom Oy | 6 |
3 |
| Andritz AG | 245 |
1 |
| AstenJohnson, Inc. | 121 |
1 |
| Valmet AB | 555 |
1 |
| Mempro Ltd. | 3 |
1 |
| Other owners | 0 |