Patent No. EP3329758 (titled "Arrangement Of A Seed Metering Device On An Agricultural Machine") was filed by Vderstad Holding on Oct 20, 2009. The application was issued on Jul 26, 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 |
|---|---|---|
| LEMKEN | Aug 25, 2021 | BUSSE & BUSSE |
| HORSCH MASCHINEN | Aug 24, 2021 | V BEZOLD & PARTNER PATENTANWALTE PARTG MBB |
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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