- All sections
- D - Textilespaper
- D21H - Pulp compositionspreparation thereof not covered by subclasses , impregnating or coating of papertreatment of finished paper not covered by class or subclass paper not otherwise provided for
- D21H 21/44 - Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
Patent holdings for IPC class D21H 21/44
Total number of patents in this class: 72
10-year publication summary
|
10
|
3
|
0
|
2
|
3
|
1
|
4
|
2
|
0
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Arjowiggins Security | 113 |
11 |
| Oberthur Fiduciaire SAS | 138 |
6 |
| LEONHARD KURZ Stiftung & Co. KG | 385 |
5 |
| Bundesdruckerei GmbH | 988 |
3 |
| Omya International AG | 781 |
3 |
| Aktsionernoe Obshchestvo "goznak" (ao "goznak") | 16 |
3 |
| China Banknote Printing and Minting Corporation | 112 |
2 |
| China Banknote SICPA Security Ink Co., Ltd. | 10 |
2 |
| Crane AB | 5 |
2 |
| Crane & Co., Inc. | 131 |
2 |
| Crane Security Technologies, Inc. | 19 |
2 |
| D W Spinks (Embossing) Ltd. | 8 |
2 |
| De La Rue International Limited | 365 |
2 |
| Fasver | 21 |
2 |
| Immunolight, LLC | 212 |
2 |
| Korea Institute of Industrial Technology | 1032 |
2 |
| Landqart AG | 10 |
2 |
| SICPA Holding SA | 957 |
2 |
| South China University of Technology | 1915 |
2 |
| Zhongchao Special Security Technology Co., Ltd. | 85 |
2 |
| Other owners | 13 |