Patent No. EP2900397 (titled "Portable Tool, Portable Expanding Apparatus, Hydraulic Piston/Cylinder Arrangement And Method For Operating A Portable Tool") was filed by Gustav Klauke on Sep 26, 2013. The application was issued on Jul 13, 2022.

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 |
|---|---|---|
| NOVOPRESS PRESSEN UND PRESSWERKZEUGE | Mar 17, 2020 | DOMPATENT VON KREISLER SELTING WERNER |
| NOVOPRESS PRESSEN UND PRESSWERKZEUGE | Mar 17, 2020 | DOMPATENT VON PATENT UND RECHTSANWALTEN |
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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