| 摘要 |
<p>The present invention relates to a marking device (1) comprising a unique and random identification pattern, characterized in that it comprises a hollow compartment (2) at least one apparent wall (2) of which is made at least locally from a transparent material (4) forming a visual access to said hollow compartment (2), solid particles (6) contained in the hollow compartment (2) and coding means for compressing and immobilizing the solid particles (6) against the transparent material (4), thus generating the identification pattern.</p> |
