- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 3/06 - Means for regulating the pressure
Patent holdings for IPC class D21F 3/06
Total number of patents in this class: 47
10-year publication summary
|
4
|
3
|
1
|
0
|
0
|
6
|
1
|
1
|
2
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2772 |
13 |
| Stowe Woodward Licensco, LLC | 53 |
11 |
| International Paper Company | 785 |
9 |
| Stowe Woodward, L.L.C. | 13 |
4 |
| Metso Paper, Inc. | 417 |
3 |
| Valmet AB | 516 |
2 |
| Seiko Epson Corporation | 19670 |
1 |
| Metso Paper Sweden Aktiebolag | 44 |
1 |
| Röchling Industrial Oepping GmbH & Co. KG | 17 |
1 |
| Saueressig Baski Oncesi Hazirlik Sistemleri Sanayi Ticaret Anonim Sirketi | 2 |
1 |
| Zibo Taiding Machinery Technology Co., Ltd | 1 |
1 |
| Other owners | 0 |