- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 1/40 - Rolls
Patent holdings for IPC class D21F 1/40
Total number of patents in this class: 33
10-year publication summary
|
1
|
1
|
2
|
5
|
3
|
0
|
1
|
1
|
2
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2742 |
15 |
| Seiko Epson Corporation | 20365 |
2 |
| Metso Paper, Inc. | 331 |
2 |
| Valmet Technologies, Inc. | 134 |
2 |
| Yamauchi Corporation | 96 |
2 |
| Eastman Chemical Company | 2097 |
1 |
| Kadant Inc. | 44 |
1 |
| Kampf Schneid- und Wickeltechnik GmbH & Co. KG | 10 |
1 |
| Randax Oy | 4 |
1 |
| Stowe Woodward Licensco, LLC | 51 |
1 |
| Structured I, LLC | 62 |
1 |
| Valmet Technologies Oy | 288 |
1 |
| Finbow Oy | 1 |
1 |
| BS Co., Ltd. | 4 |
1 |
| Shenzhen De Wei Fiber Environment Protection Technology Co., Ltd. | 1 |
1 |
| Other owners | 0 |