Patent No. EP2881184 (titled "Ultrasound Welding Device And Ultrasound Welding Method For Controlling Continuous Ultrasound Welding Processes") was filed by Branson Ultraschall Niederlassung DER Emerson OHG on Nov 21, 2014. The application was issued on Mar 27, 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 |
|---|---|---|
| HERRMANN ULTRASCHALLTECHNIK | Dec 18, 2019 | WSL 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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