Patent No. EP4173844 (titled "Pneumatic Tire") was filed by Sumitomo Rubber Industries on Mar 9, 2022. The application was issued on Jan 15, 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 |
|---|---|---|
| COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN | Oct 14, 2025 | MFP MICHELIN |
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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