Patent No. EP1993466 (titled "Dispenser And Method For Dispensing Dental Material") was filed by 3M Innovative Properties Company on Mar 8, 2007. The application was issued on Oct 12, 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 |
|---|---|---|
| RENFERT GMBH | Jul 12, 2017 | DAUB |
| DMG DENTAL MATERIAL GESELLSCHAFT | Jul 11, 2017 | GLAWE |
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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