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 |