Patent holdings for IPC class D21F 3/04

Total number of patents in this class: 145

10-year publication summary

7
11
8
7
17
14
11
7
8
5
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
Voith Patent GmbH
2755
59
Andritz AG
232
17
The Procter & Gamble Company
22028
10
Valmet AB
503
10
Metso Paper, Inc.
424
9
Seiko Epson Corporation
19321
7
Stowe Woodward Licensco, LLC
52
4
Ichikawa Co., Ltd.
104
3
International Paper Company
790
3
Duplo Seiko Corporation
87
2
Stora Enso Oyj
1637
2
Valmet Technologies Oy
287
2
UPM Specialty Papers Oy
5
2
Albany International Corp.
255
1
Allimand
3
1
Andritz Kusters GmbH
56
1
Billerudkorsnas AB
88
1
Chan Li Machinery Co., Ltd.
33
1
Eastman Chemical Company
2216
1
Metso Paper Karlstad AB
9
1
Other owners 8