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Merck Paten Gesellschaft
| Merck Paten Gesellschaft Patent applications | ||
| Patent application number | Title | Published |
|---|---|---|
| 20100072739 | OPTICALLY VARIABLE SECURITY ELEMENT - The present invention relates to an optically variable security element for protecting articles against counterfeiting, to a process for the production of a security element of this type, and to the use thereof. | 03-25-2010 |