- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 3/04 - Arrangements thereof
Patent holdings for IPC class D21F 3/04
Total number of patents in this class: 147
10-year publication summary
|
11
|
8
|
7
|
17
|
14
|
11
|
7
|
8
|
8
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2753 |
60 |
| Andritz AG | 240 |
16 |
| Valmet AB | 541 |
11 |
| The Procter & Gamble Company | 21919 |
10 |
| Metso Paper, Inc. | 353 |
9 |
| Seiko Epson Corporation | 20081 |
7 |
| Stowe Woodward Licensco, LLC | 51 |
5 |
| Duplo Seiko Corporation | 89 |
2 |
| Ichikawa Co., Ltd. | 90 |
2 |
| Stora Enso Oyj | 1635 |
2 |
| Valmet Technologies Oy | 287 |
2 |
| UPM Specialty Papers Oy | 5 |
2 |
| GCF US Holdings LLC | 141 |
2 |
| Kimberly-clark Worldwide, Inc. | 5298 |
1 |
| Albany International Corp. | 230 |
1 |
| Allimand | 4 |
1 |
| Andritz Kusters GmbH | 53 |
1 |
| Billerudkorsnas AB | 88 |
1 |
| Chan Li Machinery Co., Ltd. | 33 |
1 |
| Eastman Chemical Company | 2079 |
1 |
| Other owners | 10 |