CompanyCompetitive AnalysisCompany Patent Opposition Analysis

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: Aug 7, 2025
Patent NumberGrant DateTitleTotal Oppositions
Sep 25, 2024Spacer Expander And Oil Control Ring Including Same1
Apr 17, 2024Internal Combustion Engine Piston Ring1
Apr 12, 2023Sliding Member And Piston Ring1
Mar 31, 2021Piston Ring And Method For Manufacturing Same1
Dec 2, 2020Piston Ring1
Nov 18, 2020Piston Ring1
Oct 14, 2020Piston Ring1
Jan 29, 2020Sintered Valve Seat1

Top competitors of Kabushiki Kaisha Riken

List of top competitors of Kabushiki Kaisha Riken based on patent oppositions.