- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 1/02 - Head boxes of Fourdrinier machines
Patent holdings for IPC class D21F 1/02
Total number of patents in this class: 165
10-year publication summary
|
5
|
8
|
8
|
11
|
16
|
10
|
16
|
18
|
10
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2753 |
51 |
| Kimberly-clark Worldwide, Inc. | 5298 |
24 |
| Metso Paper, Inc. | 353 |
10 |
| Seiko Epson Corporation | 20081 |
8 |
| Stora Enso Oyj | 1635 |
7 |
| Andritz Kusters GmbH | 53 |
5 |
| International Paper Company | 603 |
4 |
| Andritz AG | 240 |
3 |
| Fiberlean Technologies Limited | 103 |
3 |
| Structured I, LLC | 62 |
3 |
| Valmet Technologies Oy | 287 |
3 |
| Paper Excellence Canada Holdings Corporation | 12 |
3 |
| Andritz Inc. | 324 |
2 |
| Eastman Chemical Company | 2079 |
2 |
| Kemira Oyj | 1244 |
2 |
| Stora Enso AB | 27 |
2 |
| Valmet AB | 541 |
2 |
| Solenis Technologies Cayman, L.P. | 35 |
2 |
| First Quality Tissue SE, LLC | 4 |
2 |
| Toray Industries, Inc. | 7067 |
1 |
| Other owners | 26 |