- 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: 164
10-year publication summary
|
19
|
8
|
5
|
5
|
9
|
12
|
5
|
4
|
10
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2740 |
57 |
| International Paper Company | 814 |
20 |
| Stowe Woodward Licensco, LLC | 48 |
19 |
| Metso Paper, Inc. | 473 |
9 |
| Seiko Epson Corporation | 19005 |
6 |
| Stowe Woodward, L.L.C. | 13 |
6 |
| Valmet AB | 496 |
5 |
| Ichikawa Co., Ltd. | 108 |
3 |
| Structured I, LLC | 57 |
3 |
| Valmet Technologies Oy | 290 |
3 |
| Honeywell International Inc. | 14022 |
2 |
| Albany International Corp. | 283 |
2 |
| Stora Enso Oyj | 1605 |
2 |
| Yamauchi Corporation | 97 |
2 |
| Suominen Oyj | 8 |
2 |
| The Procter & Gamble Company | 22147 |
1 |
| Andritz AG | 226 |
1 |
| Andritz Inc. | 337 |
1 |
| Andritz Kusters GmbH | 54 |
1 |
| Chan Li Machinery Co., Ltd. | 34 |
1 |
| Other owners | 18 |