- 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: 636
10-year publication summary
|
40
|
37
|
55
|
35
|
58
|
23
|
26
|
23
|
20
|
18
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2743 |
180 |
| Albany International Corp. | 231 |
77 |
| The Procter & Gamble Company | 21853 |
57 |
| Structured I, LLC | 62 |
28 |
| Kimberly-clark Worldwide, Inc. | 5295 |
27 |
| AstenJohnson, Inc. | 121 |
24 |
| Huyck Licensco, Inc., | 47 |
16 |
| Nippon Filcon Co., Ltd. | 114 |
15 |
| Stora Enso Oyj | 1654 |
13 |
| Valmet Technologies Oy | 288 |
12 |
| Feltri Marone S.p.A. | 14 |
11 |
| First Quality Tissue, LLC | 165 |
10 |
| Seiko Epson Corporation | 20327 |
9 |
| GPCP IP Holdings LLC | 1530 |
9 |
| Ichikawa Co., Ltd. | 87 |
8 |
| Metso Paper, Inc. | 335 |
8 |
| Valmet Technologies, Inc. | 136 |
8 |
| Weavexx, LLC | 18 |
7 |
| Astenjohnson International, Inc. | 19 |
7 |
| International Paper Company | 599 |
5 |
| Other owners | 105 |