- All sections
- D - Textilespaper
- D21D - Treatment of the materials before passing to the paper-making machine
- D21D 5/06 - Rotary screen-drums
Patent holdings for IPC class D21D 5/06
Total number of patents in this class: 57
10-year publication summary
|
1
|
7
|
5
|
5
|
3
|
5
|
2
|
3
|
1
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2740 |
9 |
| Seiko Epson Corporation | 20588 |
8 |
| Andritz Oy | 294 |
7 |
| Andritz Inc. | 325 |
3 |
| Andritz Ltd. | 17 |
3 |
| Aikawa Fiber Technologies Trust | 7 |
2 |
| International Paper Company | 590 |
2 |
| Meri Environmental Solutions GmbH | 44 |
2 |
| Metso Paper, Inc. | 312 |
2 |
| Papyrus Australia Limited | 3 |
2 |
| Valmet AB | 573 |
2 |
| Aikawa Fiber Technologies Inc. | 19 |
2 |
| Andritz China Ltd | 10 |
2 |
| Siemens AG | 23946 |
1 |
| Advanced Fiber Technologies (aft) Trust | 3 |
1 |
| Andritz Fiedler GmbH | 31 |
1 |
| Kadant Canada Corp. | 15 |
1 |
| Ovivo Luxembourg S.a.r.l. | 14 |
1 |
| Vermeer Manufacturing Company | 672 |
1 |
| Kadant Black Clawson LLC | 49 |
1 |
| Other owners | 4 |