Patent No. EP3208099 (titled "Optical Anti-Counterfeiting Element And Optical Anti-Counterfeiting Product") was filed by China Banknote Printing And Minting on Sep 11, 2015. The application was issued on Feb 19, 2020.

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 |
|---|---|---|
| GIESECKEDEVRIENT CURRENCY TECHNOLOGY | Nov 19, 2020 | GIESECKEDEVRIENT |
| LEONHARD KURZ STIFTUNG | Nov 19, 2020 | ZINSINGER |
| HUECK FOLIEN GESELLSCHAFT | Nov 18, 2020 | BURGER |
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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