- All sections
- D - Textilespaper
- D21D - Treatment of the materials before passing to the paper-making machine
- D21D 1/02 - Methods of beatingBeaters of the Hollander type
Patent holdings for IPC class D21D 1/02
Total number of patents in this class: 26
10-year publication summary
|
1
|
4
|
1
|
4
|
4
|
3
|
1
|
5
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Seiko Epson Corporation | 19352 |
2 |
| Andritz Inc. | 332 |
2 |
| Polycorp Ltd. | 67 |
2 |
| Zhejiang University of Science and Technology | 36 |
2 |
| Pulmac Systems International, Inc. | 7 |
2 |
| Cleanfiber, LLC | 6 |
2 |
| Catexel Limited | 18 |
1 |
| Domsjö Fabriker AB | 7 |
1 |
| Hainan Jinhai Pulp & Paper Co., Ltd | 4 |
1 |
| Jiangnan University | 1529 |
1 |
| SAPPI Netherlands Services B.V. | 37 |
1 |
| SCA Forest Products AB | 81 |
1 |
| Valmet Technologies Oy | 288 |
1 |
| Finecell Sweden AB | 3 |
1 |
| Nanocarbon Co., Ltd | 1 |
1 |
| Xinjiang Guoliyuan Investment Co., Ltd. | 9 |
1 |
| Henan Kelway Nano Carbon Material Co., Ltd | 1 |
1 |
| Guangdong JD Circuit Technology Co., Ltd. | 1 |
1 |
| Marubeni (Shanghai) Co., Ltd. | 1 |
1 |
| Goldcup 33965 AB (unc. Hejmas Agrifibre Technologies AB) | 1 |
1 |
| Other owners | 0 |