- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 9/00 - Complete machines for making continuous webs of paper
Patent holdings for IPC class D21F 9/00
Total number of patents in this class: 342
10-year publication summary
|
16
|
25
|
33
|
25
|
22
|
16
|
18
|
22
|
27
|
8
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2778 |
101 |
| Seiko Epson Corporation | 20013 |
67 |
| Valmet AB | 535 |
19 |
| Kimberly-clark Worldwide, Inc. | 5281 |
16 |
| Andritz AG | 237 |
11 |
| GPCP IP Holdings LLC | 1545 |
8 |
| Stora Enso Oyj | 1631 |
7 |
| Structured I, LLC | 62 |
7 |
| Valmet Technologies Oy | 285 |
6 |
| International Paper Company | 609 |
5 |
| Metso Paper, Inc. | 360 |
5 |
| delfortgroup AG | 154 |
4 |
| Valmet Technologies, Inc. | 137 |
4 |
| Centre Technique du Papier | 18 |
3 |
| Duplo Seiko Corporation | 90 |
3 |
| Mayr-Melnhof Karton Aktiengesellschaft | 223 |
3 |
| Teknologian Tutkimuskeskus VTT Oy | 567 |
3 |
| Paper Excellence Canada Holdings Corporation | 12 |
3 |
| Honeywell International Inc. | 12786 |
2 |
| Centre National de La Recherche Scientifique | 10865 |
2 |
| Other owners | 63 |