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Bayer ruling shows how Japan's patent linkage protects innovator communications

By Toko Sekiguchi ( December 9, 2025, 08:56 GMT | Comment) -- Japan’s patent-linkage system came into sharp relief after a Tokyo court ruled for Bayer, clarifying how patent warnings and regulatory submissions stay shielded from unfair-competition attacks.A Tokyo District Court decision rejecting Nihon Generic’s unfair competition claims against Bayer over the anticoagulant rivaroxaban narrows the circumstances in which patent communications can be attacked as reputationally harmful in Japan....

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