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Patent AT-E400449-T1: [Translated] ANTI-COUNTERFEIT SECURITY FEATURE WITH COLOR SHIPPING EFFECT

Published by National Center for Biotechnology Information (NCBI) | U.S. Department of Health & Human Services | Metadata Last Checked: September 07, 2025 | Last Modified: 2025-09-06
A tamper-proof security element includes at least one polymer spacer layer and two metal cluster layers. One or more of the layers, in addition to their function, fulfills a security feature in their color-shift set-up.

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