- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 1/34 - Construction or arrangement of spraying pipes
Patent holdings for IPC class D21F 1/34
Total number of patents in this class: 28
10-year publication summary
|
0
|
0
|
2
|
3
|
1
|
2
|
1
|
0
|
4
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2765 |
6 |
| Seiko Epson Corporation | 19458 |
3 |
| Dubois Chemicals, Inc. | 177 |
3 |
| Honeywell ASCa Inc. | 107 |
3 |
| Kadant Inc. | 45 |
3 |
| MainTech Co., Ltd. | 66 |
2 |
| Paprima Industries Inc. | 22 |
2 |
| Kimberly-clark Worldwide, Inc. | 5449 |
1 |
| Honeywell Acsa Inc. | 1 |
1 |
| Hunter Industries, Inc. | 297 |
1 |
| Papiermaschinen-systemtechnik GmbH | 5 |
1 |
| Valmet AB | 511 |
1 |
| Inspiron Engineering Private Limited | 2 |
1 |
| Other owners | 0 |