Patent No. EP3326888 (titled "Test Device For And Method Of Testing Interoperability Of Railway Vehicles") was filed by Bombardier Transportation on Nov 21, 2017. The application was issued on Aug 25, 2021.

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 |
|---|---|---|
| SIEMENS MOBILITY | May 25, 2022 | SIEMENS PATENT ATTORNEYS |
| OBB TECHNISCHE SERVICES GESELLSCHAFT | May 24, 2022 | PUCHBERGER & PARTNER PATENTANWALTE |
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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