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Patent No. EP2742135 (titled "Linkage Modified Gapped Oligomeric Compounds And Uses Thereof") was filed by Ionis Pharmaceuticals on Aug 8, 2012. The application was issued on Jun 10, 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.
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