- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 1/32 - Washing wire-cloths or felts
Patent holdings for IPC class D21F 1/32
Total number of patents in this class: 116
10-year publication summary
|
9
|
9
|
14
|
8
|
14
|
3
|
6
|
2
|
4
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| MainTech Co., Ltd. | 66 |
17 |
| Voith Patent GmbH | 2741 |
13 |
| S.A. Giuseppe Cristini S.p.A. | 26 |
9 |
| Dubois Chemicals, Inc. | 172 |
8 |
| Valmet AB | 556 |
7 |
| Paprima Industries Inc. | 22 |
6 |
| Ecolab USA Inc. | 5813 |
5 |
| Seiko Epson Corporation | 20337 |
4 |
| First Quality Tissue, LLC | 166 |
4 |
| Kadant Inc. | 44 |
4 |
| Valmet Technologies, Inc. | 136 |
4 |
| GPCP IP Holdings LLC | 1531 |
4 |
| International Paper Company | 598 |
3 |
| Andritz AG | 245 |
2 |
| Buckman Laboratories International, Inc. | 240 |
2 |
| CTP GmbH | 17 |
2 |
| Metso Paper, Inc. | 333 |
2 |
| Solenis Technologies, L.P. | 304 |
2 |
| Structured I, LLC | 62 |
2 |
| Novozymes A/S | 3388 |
1 |
| Other owners | 15 |