Patent No. EP3378434 (titled "Method For The Production Of A Dental Structure, Produced Dental Structure And Dental Assembly Formed By A Structure Screwed Onto A Dental Implant") was filed by XAM MAR Mangrane on Jan 21, 2016. The application was issued on May 20, 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.
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.