Patent No. EP3744605 (titled "Railway Train Operation Control Method And System") was filed by Crrc Changchun Railway Vehicles on Nov 22, 2019. The application was issued on Jan 4, 2023.

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 |
|---|---|---|
| AZD PRAHA SRO | Oct 4, 2023 | DIEHL & PARTNER |
| CAF SIGNALLING | Oct 4, 2023 | IGARTUA |
| GTS DEUTSCHLAND | Oct 4, 2023 | KOHLER SCHMID MOBUS PATENTANWALTE |
| KNORR BREMSE SYSTEME FUR SCHIENENFAHRZEUGE | Oct 4, 2023 | NOVENTIVE PATENTANWALTSGESELLSCHAFT |
| HITACHI RAIL STS | Oct 3, 2023 | METROCONSULT |
| ALSTOM | Oct 2, 2023 | LAVOIX |
| SIEMENS MOBILITY | Oct 2, 2023 | SIEMENS PATENT ATTORNEYS |
| STADLER RAIL | Sep 25, 2023 | HEPP WENGER RYFFEL |
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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