- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 1/00 - Wet end of machines for making continuous webs of paper
Patent holdings for IPC class D21F 1/00
Total number of patents in this class: 644
10-year publication summary
|
56
|
36
|
34
|
52
|
34
|
46
|
19
|
23
|
22
|
9
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2764 |
180 |
| Albany International Corp. | 258 |
82 |
| The Procter & Gamble Company | 22045 |
52 |
| Kimberly-clark Worldwide, Inc. | 5499 |
27 |
| AstenJohnson, Inc. | 128 |
25 |
| Structured I, LLC | 58 |
25 |
| Huyck Licensco, Inc., | 46 |
15 |
| Nippon Filcon Co., Ltd. | 125 |
15 |
| Metso Paper, Inc. | 421 |
13 |
| Valmet Technologies Oy | 285 |
12 |
| Feltri Marone S.p.A. | 14 |
11 |
| Stora Enso Oyj | 1648 |
11 |
| First Quality Tissue, LLC | 156 |
10 |
| Valmet Technologies, Inc. | 146 |
9 |
| GPCP IP Holdings LLC | 1637 |
9 |
| Seiko Epson Corporation | 19425 |
8 |
| Ichikawa Co., Ltd. | 101 |
8 |
| Weavexx, LLC | 19 |
6 |
| International Paper Company | 787 |
5 |
| Astenjohnson International, Inc. | 16 |
5 |
| Other owners | 116 |