Patent No. EP3338813 (titled "Multi-Layer Wound Care Product With Perforated Release Layer") was filed by BSN Medical on Dec 20, 2016. The application was issued on Jan 29, 2020.

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 |
|---|---|---|
| KCI MANUFACTURING UNLIMITED | Oct 29, 2020 | SIMMONS & SIMMONS |
| MOLNLYCKE HEALTH CARE | Sep 29, 2020 | TOSTMANN |
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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