Patent No. EP3129149 (titled "Method And Apparatus For Dismounting And Mounting An Annular Sleeve") was filed by Maschinenfabrik Kppern on Dec 19, 2014. The application was issued on Jul 1, 2020.

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 |
|---|---|---|
| THERMOPROZESS INDUKTIONSWARME | Mar 31, 2021 | LENZING GERBER STUTE |
| TAKRAF | Mar 30, 2021 | KAILUWEIT & UHLEMANN PATENTANWALTE PARTNERSCHAFT 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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