Patent No. EP2110110 (titled "Diaper Fastener, Nappy, Semi-Finished Strips, Application Method For A Diaper Fastener And Production Method For A Semi-Finished Strip") was filed by Koester on Apr 6, 2009. The application was issued on Apr 1, 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 |
|---|---|---|
| 3M INNOVATIVE PROPERTIES COMPANY | Apr 26, 2017 | MULLER |
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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