Patent No. EP2274655 (titled "Method, System And Bus Coupler For Exchanging Data Between An Overlay Network And An Underlay Network") was filed by Phoenix Contact on Apr 14, 2009. The application was issued on Apr 17, 2019.

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 |
|---|---|---|
| FESTO | May 6, 2016 | PATENTANWALTE MAGENBAUER & KOLLEGEN PARTNERSCHAFT MBB |
| WAGO KONTAKTTECHNIK GMBH & CO. KG | May 4, 2016 | HOHGARDT |
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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