Patent No. EP2578797 (titled "Method For Managing Drilling Rods, Drilling Tools, Borehole Piping And The Like For Boreholes") was filed by Keuro Besitz EDV Dienstleistungs on Oct 7, 2011. The application was issued on May 3, 2017.

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 |
|---|---|---|
| HERRENKNECHT VERTICAL | Feb 5, 2018 | KLICKOW & WETZEL PARTGMBB |
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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