- 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: 640
10-year publication summary
|
64
|
40
|
37
|
55
|
35
|
58
|
23
|
25
|
23
|
9
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2759 |
179 |
| Albany International Corp. | 253 |
79 |
| The Procter & Gamble Company | 22017 |
52 |
| Kimberly-clark Worldwide, Inc. | 5496 |
27 |
| AstenJohnson, Inc. | 128 |
25 |
| Structured I, LLC | 58 |
25 |
| Huyck Licensco, Inc., | 46 |
15 |
| Nippon Filcon Co., Ltd. | 120 |
15 |
| Metso Paper, Inc. | 422 |
13 |
| Valmet Technologies Oy | 288 |
12 |
| Feltri Marone S.p.A. | 14 |
11 |
| Stora Enso Oyj | 1636 |
11 |
| First Quality Tissue, LLC | 156 |
10 |
| Valmet Technologies, Inc. | 147 |
9 |
| GPCP IP Holdings LLC | 1631 |
9 |
| Seiko Epson Corporation | 19352 |
8 |
| Ichikawa Co., Ltd. | 103 |
8 |
| Weavexx, LLC | 19 |
6 |
| International Paper Company | 788 |
5 |
| Astenjohnson International, Inc. | 16 |
5 |
| Other owners | 116 |