- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 1/44 - Watermarking devices
Patent holdings for IPC class D21F 1/44
Total number of patents in this class: 62
10-year publication summary
|
2
|
5
|
4
|
2
|
1
|
2
|
2
|
1
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Giesecke & Devrient GmbH | 812 |
11 |
| De La Rue International Limited | 367 |
7 |
| Crane & Co., Inc. | 129 |
6 |
| Giesecke+Devrient Currency Technology GmbH | 954 |
6 |
| Arjowiggins Security | 114 |
5 |
| Unicharm Corporation | 2968 |
4 |
| Fedrigoni S.p.A. | 264 |
3 |
| Albany International Corp. | 232 |
2 |
| schoen + sandt machinery GmbH | 2 |
2 |
| Chengdu Banknote Printing Co., Ltd. | 2 |
2 |
| Chinese Seal Banknote Making Corporation | 2 |
2 |
| Kimberly-clark Worldwide, Inc. | 5308 |
1 |
| Arjowiggins Security B.V. | 1 |
1 |
| Banque de France | 42 |
1 |
| China Banknote Printing and Minting Corporation | 111 |
1 |
| Fabrica Nacional de Moneda y Timbre - Real Casa de La Moneda | 39 |
1 |
| Oberthur Fiduciaire SAS | 138 |
1 |
| Vhp Veiligheidspapierfabriek Ugchelen B.V. | 2 |
1 |
| HKC Corporation Limited | 3489 |
1 |
| Portals de La Rue Limited | 2 |
1 |
| Other owners | 3 |