- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 1/48 - Suction apparatus
Patent holdings for IPC class D21F 1/48
Total number of patents in this class: 91
10-year publication summary
|
5
|
5
|
6
|
6
|
4
|
3
|
3
|
1
|
7
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2764 |
18 |
| IBS of America | 26 |
11 |
| Metso Paper, Inc. | 421 |
11 |
| Kimberly-clark Worldwide, Inc. | 5499 |
5 |
| Seiko Epson Corporation | 19425 |
4 |
| AstenJohnson, Inc. | 128 |
4 |
| Valmet Technologies, Inc. | 146 |
4 |
| The Procter & Gamble Company | 22045 |
2 |
| Andritz Inc. | 332 |
2 |
| Fcpapel LLC | 2 |
2 |
| Moventas Oy | 7 |
2 |
| Runtech Systems Oy | 23 |
2 |
| Valmet AB | 511 |
2 |
| Bmic LLC | 736 |
2 |
| Fibu AB | 3 |
2 |
| Andritz AG | 233 |
1 |
| Andritz Kusters GmbH | 56 |
1 |
| Chan Li Machinery Co., Ltd. | 33 |
1 |
| Johns Manville | 959 |
1 |
| KIEFEL GmbH | 138 |
1 |
| Other owners | 13 |