- All sections
- D - Textilespaper
- D21B - Fibrous raw materials or their mechanical treatment
- D21B 1/32 - Defibrating by other means of waste paper
Patent holdings for IPC class D21B 1/32
Total number of patents in this class: 200
10-year publication summary
|
13
|
15
|
12
|
19
|
19
|
9
|
15
|
11
|
15
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2762 |
36 |
| Seiko Epson Corporation | 19398 |
13 |
| Unicharm Corporation | 2871 |
10 |
| Uni-Charm Corporation | 602 |
8 |
| Duplo Seiko Corporation | 89 |
7 |
| Juno LLC | 19 |
7 |
| Fiberlean Technologies Limited | 114 |
5 |
| Kemira Oyj | 1207 |
5 |
| Taizen Co., Ltd. | 7 |
5 |
| Nippon Paper Industries Co., Ltd. | 832 |
4 |
| Stora Enso Oyj | 1647 |
4 |
| Red Wire Oy | 5 |
4 |
| Kadant Black Clawson LLC | 39 |
4 |
| Kadant Lamort | 23 |
3 |
| Meri Environmental Solutions GmbH | 42 |
3 |
| Metso Paper, Inc. | 422 |
3 |
| TamPulping Oy | 4 |
3 |
| Rithco Papertec GmbH | 4 |
3 |
| Repulping Technology GmbH & Co. KG | 3 |
3 |
| Koehler Innovation & Technology GmbH | 46 |
3 |
| Other owners | 67 |