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Kabushiki Kaisha Riken competitive analysis

Latest publications and patents of Kabushiki Kaisha Riken New

Explore the latest publications and patents granted to Kabushiki Kaisha Riken, showcasing their recent innovations and technological advancements.

Last updated on: Sep 3, 2025
Publication NumberPublication DateTitleLegal Status

Get instant update for new patents of Kabushiki Kaisha Riken

EP4303425
Aug 20, 2025Side Rail And Oil Control Ring Comprising SameGranted And Under Opposition
EP3779244
Sep 25, 2024Spacer Expander And Oil Control Ring Including SameGranted And Under Opposition
EP3321543
Apr 17, 2024Internal Combustion Engine Piston RingPatent Maintained As Amended
EP3660180
Apr 12, 2023Sliding Member And Piston RingGranted And Under Opposition
EP3064810
Mar 31, 2021Piston Ring And Method For Manufacturing SamePatent Maintained As Amended
EP3273113
Dec 2, 2020Piston RingGranted And Under Opposition
EP3421846
Nov 18, 2020Piston RingOpposition Rejected
EP3163129
Oct 14, 2020Piston RingRevoked
EP3406865
Jan 29, 2020Sintered Valve SeatGranted And Under Opposition

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 4, 2025
Patent NumberGrant DateTitleTotal Oppositions
EP3779244
Sep 25, 2024Spacer Expander And Oil Control Ring Including Same1
EP3321543
Apr 17, 2024Internal Combustion Engine Piston Ring1
EP3660180
Apr 12, 2023Sliding Member And Piston Ring1
EP3064810
Mar 31, 2021Piston Ring And Method For Manufacturing Same1
EP3273113
Dec 2, 2020Piston Ring1
EP3421846
Nov 18, 2020Piston Ring1
EP3163129
Oct 14, 2020Piston Ring1
EP3406865
Jan 29, 2020Sintered Valve Seat1

Latest PTAB cases involving Kabushiki Kaisha Riken New

Discover the latest PTAB cases involving Kabushiki Kaisha Riken, highlighting their recent legal challenges and patent disputes.

Top competitors of Kabushiki Kaisha Riken

Top competitors of Kabushiki Kaisha Riken based on patent oppositions.