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Patent No. EP3976398 (titled "Anti-Skid Device With External Mounting To The Hub Of A Wheel Particularly For Wheels With Alloy Rims") was filed by Knig on May 6, 2020. The application was issued on Dec 21, 2022.

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 |
|---|---|---|
| RUD KETTEN RIEGER & DIETZ U | Sep 21, 2023 | GRUNECKER PATENT |
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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