Patent No. EP2710416 (titled "Two-Dimensionally Periodic, Colour-Filtering Grating") was filed by Giesecke & Devrient on May 10, 2012. The application was issued on Aug 14, 2019.

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 |
|---|---|---|
| HUECK FOLIEN GESELLSCHAFT | May 13, 2020 | KLIMENT & HENHAPEL |
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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