- All sections
- D - Textilespaper
- D21D - Treatment of the materials before passing to the paper-making machine
- D21D 1/28 - Ball or rod mills
Patent holdings for IPC class D21D 1/28
Total number of patents in this class: 5
10-year publication summary
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0
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0
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0
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0
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1
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0
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0
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2
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0
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0
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Limited Liability Company "prof Business" | 9 |
2 |
| Andritz Inc. | 326 |
1 |
| Fiberlean Technologies Limited | 104 |
1 |
| Weidmann Holding AG | 30 |
1 |
| Other owners | 0 |