Patent No. EP3322924 (titled "Marked Keg/Cask Seal, And Method For Determining The Age Of A Keg/Cask Seal") was filed by DSI Getrnkearmaturen on Jul 13, 2016. The application was issued on Dec 26, 2018.

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 |
|---|---|---|
| MICRO MATIC | Sep 26, 2019 | ZACCO DENMARK |
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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