- All sections
- D - Textilespaper
- D21J - Fibreboardmanufacture of articles from cellulosic fibrous suspensions or from papier-mâché
- D21J 1/18 - Hardboard
Patent holdings for IPC class D21J 1/18
Total number of patents in this class: 6
10-year publication summary
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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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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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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| EMPA Eidgenössische Materialprüfungs-und Forschungsanstalt | 188 |
2 |
| Eth Zurich | 1287 |
2 |
| Ewald Dorken AG | 249 |
1 |
| Maezawa Industries, Inc. | 14 |
1 |
| Other owners | 0 |