Patent No. EP3990997 (titled "Free-Moving Transport Carriage And Conveying System For Conveying And Treatment System For Treating Workpieces") was filed by Eisenmann on Apr 30, 2020. The application was issued on Dec 6, 2023.

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 |
|---|---|---|
| SEW EURODRIVE | Sep 4, 2024 | - |
| DURR SYSTEMS | Aug 26, 2024 | DTS PATENT UND RECHTSANWALTE PARTMBB |
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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