- 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: 145
10-year publication summary
7
|
11
|
8
|
7
|
17
|
14
|
11
|
7
|
8
|
5
|
2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Voith Patent GmbH | 2755 |
59 |
Andritz AG | 232 |
17 |
The Procter & Gamble Company | 22028 |
10 |
Valmet AB | 503 |
10 |
Metso Paper, Inc. | 424 |
9 |
Seiko Epson Corporation | 19321 |
7 |
Stowe Woodward Licensco, LLC | 52 |
4 |
Ichikawa Co., Ltd. | 104 |
3 |
International Paper Company | 790 |
3 |
Duplo Seiko Corporation | 87 |
2 |
Stora Enso Oyj | 1637 |
2 |
Valmet Technologies Oy | 287 |
2 |
UPM Specialty Papers Oy | 5 |
2 |
Albany International Corp. | 255 |
1 |
Allimand | 3 |
1 |
Andritz Kusters GmbH | 56 |
1 |
Billerudkorsnas AB | 88 |
1 |
Chan Li Machinery Co., Ltd. | 33 |
1 |
Eastman Chemical Company | 2216 |
1 |
Metso Paper Karlstad AB | 9 |
1 |
Other owners | 8 |