- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 3/08 - Pressure rolls
Patent holdings for IPC class D21F 3/08
Total number of patents in this class: 166
10-year publication summary
|
8
|
5
|
5
|
9
|
12
|
6
|
4
|
11
|
9
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2746 |
59 |
| International Paper Company | 600 |
20 |
| Stowe Woodward Licensco, LLC | 51 |
18 |
| Seiko Epson Corporation | 20288 |
12 |
| Metso Paper, Inc. | 336 |
8 |
| Stowe Woodward, L.L.C. | 12 |
5 |
| Valmet AB | 555 |
5 |
| Ichikawa Co., Ltd. | 87 |
3 |
| Structured I, LLC | 62 |
3 |
| Valmet Technologies Oy | 288 |
3 |
| Honeywell International Inc. | 12773 |
2 |
| Stora Enso Oyj | 1650 |
2 |
| Suominen Oyj | 13 |
2 |
| Essity Hygiene and Health Aktiebolag | 2168 |
2 |
| The Procter & Gamble Company | 21856 |
1 |
| Albany International Corp. | 232 |
1 |
| Andritz AG | 244 |
1 |
| Andritz Inc. | 322 |
1 |
| Andritz Kusters GmbH | 53 |
1 |
| Chan Li Machinery Co., Ltd. | 33 |
1 |
| Other owners | 16 |