Patent No. EP4013636 (titled "Drive System For A Pantograph, And Method For Raising Or Lowering") was filed by Schunk Transit Systems on Aug 12, 2019. The application was issued on Sep 25, 2024.

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 |
|---|---|---|
| FAIVELEY TRANSPORT TOURS | Jun 24, 2025 | IXAS CONSEIL |
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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