- 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: 119
10-year publication summary
|
9
|
8
|
12
|
6
|
9
|
3
|
5
|
2
|
3
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| MainTech Co., Ltd. | 67 |
18 |
| Voith Patent GmbH | 2773 |
13 |
| S.A. Giuseppe Cristini S.p.A. | 26 |
9 |
| Dubois Chemicals, Inc. | 171 |
8 |
| Valmet AB | 534 |
7 |
| Paprima Industries Inc. | 22 |
6 |
| Ecolab USA Inc. | 5722 |
5 |
| Seiko Epson Corporation | 19988 |
4 |
| First Quality Tissue, LLC | 159 |
4 |
| Kadant Inc. | 44 |
4 |
| Valmet Technologies, Inc. | 137 |
4 |
| GPCP IP Holdings LLC | 1549 |
4 |
| International Paper Company | 611 |
3 |
| Andritz AG | 238 |
2 |
| AstenJohnson, Inc. | 124 |
2 |
| Buckman Laboratories International, Inc. | 238 |
2 |
| CTP GmbH | 17 |
2 |
| Metso Paper, Inc. | 361 |
2 |
| Solenis Technologies, L.P. | 320 |
2 |
| Structured I, LLC | 62 |
2 |
| Other owners | 16 |