Patent No. EP1532315 (titled "Welding Of An Element Of A Track Unit And A Rail Section Without Adding Any Material") was filed by Vossloh Cogifer on May 23, 2003. The application was issued on Nov 30, 2016.

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 |
|---|---|---|
| VOESTALPINE VAE | Aug 30, 2017 | KESCHMANN |
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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