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Kabushiki Kaisha Riken patent opposition analysis

Get complete Patent Opposition Report for Kabushiki Kaisha Riken

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Latest patents of Kabushiki Kaisha Riken opposed by its competitors

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.

Last updated on: Sep 11, 2025

Patent Number	Grant Date	Title	Total Oppositions
EP3779244	Sep 25, 2024	Spacer Expander And Oil Control Ring Including Same	1
EP3321543	Apr 17, 2024	Internal Combustion Engine Piston Ring	1
EP3660180	Apr 12, 2023	Sliding Member And Piston Ring	1
EP3064810	Mar 31, 2021	Piston Ring And Method For Manufacturing Same	1
EP3273113	Dec 2, 2020	Piston Ring	1
EP3421846	Nov 18, 2020	Piston Ring	1
EP3163129	Oct 14, 2020	Piston Ring	1
EP3406865	Jan 29, 2020	Sintered Valve Seat	1

Top competitors of Kabushiki Kaisha Riken

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