Patent No. EP4340643 (titled "Tobacco Medium And Aerosol-Generating Article Comprising The Same") was filed by KT & G on May 10, 2022. The application was issued on Nov 26, 2025.

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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