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Explore Eisai R&d Management's recently opposed patents, revealing key competitive challenges and strategic patent disputes in the industry. Track oppositions filed by competitors to understand technology battlegrounds and assess potential risks.

Last updated on: Jun 26, 2025
Patent NumberGrant DateTitleTotal Oppositions
EP3581183Nov 29, 2023Tumor-Treating Pharmaceutical Composition1
EP3263106Oct 25, 2023Method For Suppressing Bitterness Of Quinoline Derivative8
EP3524595Aug 10, 2022High-Purity Quinoline Derivative And Method For Manufacturing Same9
EP3265122May 4, 2022Combination Of A Pd-1 Antagonist And Eribulin For Treating Cancer4
EP3338779Jun 30, 2021Tumor Therapeutic Agent1