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Japan IP Court upholds invalidation of Kowa's glaucoma eye-drop packaging patent

By Toko Sekiguchi ( February 18, 2026, 07:29 GMT | Insight) -- Japan’s Intellectual Property High Court upheld a patent-office decision invalidating most of Kowa Company’s patent covering packaging for its glaucoma drug Granatec, siding with a challenge from generic maker Toa Pharmaceuticals.Japan’s Intellectual Property High Court upheld a patent-office decision invalidating most of Kowa Company’s patent covering packaging for its glaucoma drug Granatec, siding with a challenge from generic maker Toa Pharmaceuticals....

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