Patent No. EP2253479 (titled "Micro-Optic Security And Image Presentation System") was filed by Visual Physics on Nov 22, 2004. The application was issued on Apr 28, 2021.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative |
|---|---|---|
| CCL SECURE | Jan 28, 2022 | LINCOLN |
| LEONHARD KURZ STIFTUNG | Jan 28, 2022 | LOUIS POHLAU LOHRENTZ |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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