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PTAB Upholds Corteva's Patent For Insect-Repellent Corn The Patent Trial and Appeal Board (PTAB) has recently upheld the patent held by Corteva Agriscience LLC for an insect-repellent corn plant. Thi... Read the full IIPLA article: https://iipla.org/news/ptab-upholds-cortevas-patent-for-insect-repellent-corn