Patent No. EP1901920 (titled "Blister Base Part And Blister Pack") was filed by 3A Technology & Management on Jun 13, 2006. The application was issued on May 4, 2016.

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 |
|---|---|---|
| CONSTANTIA TEICH | Feb 2, 2017 | PATENTANWALTE BARGER |
| HOFFMANN EITLE | Feb 1, 2017 | HOFFMANN EITLE |
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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