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Explore Kabushiki Kaisha Riken'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.

Patent NumberGrant DateTitleTotal Oppositions
EP3321543Apr 17, 2024Internal Combustion Engine Piston Ring1
EP3660180Apr 12, 2023Sliding Member And Piston Ring1
EP3064810Mar 31, 2021Piston Ring And Method For Manufacturing Same1
EP3273113Dec 2, 2020Piston Ring1
EP3421846Nov 18, 2020Piston Ring1
EP3163129Oct 14, 2020Piston Ring1
EP3406865Jan 29, 2020Sintered Valve Seat1