Patent No. EP3684976 (titled "Switch Device") was filed by Voestalpine BWG on Sep 10, 2018. The application was issued on Nov 24, 2021.
A monoblock switch device with improved driving comfort and reduced wheel wear, featuring an S-shaped joint connecting the tongue and connecting rails. The S-shaped joint provides a longer, two-part wheel running surface and eliminates the abrupt wheel overrun associated with traditional butt joints. The tongue rail is secured against longitudinal movement by a walking protection plate that runs adjacent to the S-shaped joint.

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 |
|---|---|---|
| VOSSLOH COGIFER | Aug 22, 2022 | KUTSCH |
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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