- All sections
- D - Textiles; paper
- D21F - Paper-making machines; methods 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: 658
10-year publication summary
|
64
|
40
|
37
|
55
|
35
|
58
|
23
|
25
|
22
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2734 |
177 |
| Albany International Corp. | 282 |
89 |
| The Procter & Gamble Company | 22151 |
53 |
| Kimberly-clark Worldwide, Inc. | 5520 |
26 |
| AstenJohnson, Inc. | 134 |
25 |
| Structured I, LLC | 57 |
25 |
| Metso Paper, Inc. | 478 |
20 |
| Huyck Licensco, Inc., | 46 |
15 |
| Nippon Filcon Co., Ltd. | 139 |
15 |
| Valmet Technologies Oy | 290 |
12 |
| Stora Enso Oyj | 1605 |
11 |
| Feltri Marone S.p.A. | 13 |
10 |
| First Quality Tissue, LLC | 150 |
9 |
| Valmet Technologies, Inc. | 160 |
9 |
| GPCP IP Holdings LLC | 1686 |
9 |
| Seiko Epson Corporation | 18984 |
8 |
| Ichikawa Co., Ltd. | 108 |
8 |
| Weavexx, LLC | 22 |
7 |
| International Paper Company | 815 |
5 |
| Astenjohnson International, Inc. | 15 |
5 |
| Other owners | 120 |