Patent No. EP3271136 (titled "Sonotrode For An Ultrasound Welding System And Method For Welding A Connection Element To A Component") was filed by Rehau on Mar 15, 2016. The application was issued on Apr 19, 2023.

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.
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