Patent No. EP3894319 (titled "A Drive Arrangement For A Cycloidal Marine Propulsion Unit, A Cycloidal Marine Propulsion Unit And A Method Of Operating Such A Drive Arrangement") was filed by ABB on Dec 14, 2018. The application was issued on Feb 5, 2025.

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 |
|---|---|---|
| VOITH PATENT | Nov 4, 2025 | MEISSNER BOLTE PARTNERSCHAFT MBB |
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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