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Explore Dong A Pencil'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: Jul 3, 2025
Patent NumberGrant DateTitleTotal Oppositions
EP3109286Jul 24, 2019Thermochromic Micro Particles And Thermochromic Ink Composition, Writing Apparatus And Smart Window Using The Same1