Patent No. EP2934903 (titled "Security Feature For A Product Of Value And/Or Security Product, Product Of Value And/Or Security Product Having The Security Feature And Method For Producing The Security Feature") was filed by Bundesdruckerei on Dec 19, 2013. The application was issued on Jun 15, 2022.

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.
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.