- All sections
- D - Textiles; paper
- D21F - Paper-making machines; methods of producing paper thereon
- D21F 3/08 - Pressure rolls
Patent holdings for IPC class D21F 3/08
Total number of patents in this class: 161
10-year publication summary
|
27
|
19
|
8
|
5
|
5
|
9
|
12
|
5
|
4
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2727 |
56 |
| International Paper Company | 857 |
20 |
| Stowe Woodward Licensco, LLC | 42 |
18 |
| Metso Paper, Inc. | 528 |
9 |
| Stowe Woodward, L.L.C. | 16 |
7 |
| Seiko Epson Corporation | 18724 |
5 |
| Valmet AB | 463 |
5 |
| Ichikawa Co., Ltd. | 113 |
3 |
| Structured I, LLC | 54 |
3 |
| Valmet Technologies Oy | 284 |
3 |
| Honeywell International Inc. | 13799 |
2 |
| Albany International Corp. | 311 |
2 |
| Yamauchi Corporation | 101 |
2 |
| Suominen Oyj | 6 |
2 |
| The Procter & Gamble Company | 22178 |
1 |
| Andritz AG | 218 |
1 |
| Andritz Inc. | 344 |
1 |
| Andritz Kusters GmbH | 50 |
1 |
| Chan Li Machinery Co., Ltd. | 38 |
1 |
| GAMBINI S.p.A. | 23 |
1 |
| Other owners | 18 |