- All sections
- D - Textiles; paper
- D21F - Paper-making machines; methods 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: 310
10-year publication summary
|
20
|
29
|
17
|
25
|
35
|
25
|
24
|
16
|
19
|
8
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2727 |
94 |
| Seiko Epson Corporation | 18724 |
62 |
| Valmet AB | 463 |
17 |
| Andritz AG | 218 |
11 |
| Metso Paper, Inc. | 528 |
10 |
| GPCP IP Holdings LLC | 1733 |
10 |
| Kimberly-clark Worldwide, Inc. | 5854 |
8 |
| International Paper Company | 857 |
7 |
| Structured I, LLC | 54 |
6 |
| Valmet Technologies Oy | 284 |
6 |
| Valmet Technologies, Inc. | 174 |
5 |
| delfortgroup AG | 147 |
4 |
| Mayr-Melnhof Karton Aktiengesellschaft | 209 |
4 |
| Stora Enso Oyj | 1504 |
4 |
| Centre Technique du Papier | 19 |
3 |
| Duplo Seiko Corporation | 93 |
3 |
| Teknologian Tutkimuskeskus VTT Oy | 471 |
3 |
| Honeywell International Inc. | 13799 |
2 |
| Centre National de La Recherche Scientifique | 9632 |
2 |
| Andritz Kuesters GmbH | 10 |
2 |
| Other owners | 47 |