Assignee
KK RIKEN
JP·66 granted patents·18 pending applications·64 citations·filing 2012–2024
Top patents by PatentIndex Score
84 records- 0192US11933407B2Compression ringKK RIKEN·Filed 2020·Granted Mar 19, 2024·2 cites·9 claims
- 0289US10584618B2Sintered valve seatKK RIKEN·Filed 2017·Granted Mar 10, 2020·4 cites·15 claims
- 0386US9851006B2Taper-faced compression ring and wire thereforKK RIKEN·Filed 2013·Granted Dec 26, 2017·4 cites·9 claims
- 0485US10006546B2Piston ringKK RIKEN·Filed 2014·Granted Jun 26, 2018·4 cites·8 claims
- 0584US10267421B2Seal ringKK RIKEN·Filed 2014·Granted Apr 23, 2019·11 cites·15 claims
- 0682US11168790B2Sliding member and piston ringKK RIKEN·Filed 2018·Granted Nov 9, 2021·4 cites·9 claims
- 0781US9644738B2Combination of cylinder and piston ringKK RIKEN·Filed 2013·Granted May 9, 2017·3 cites·6 claims
- 0880US10344636B2Sintered valve seat and its production methodKK RIKEN·Filed 2015·Granted Jul 9, 2019·2 cites·6 claims
- 0980US9822433B2Spheroidal graphite cast ironKK RIKEN·Filed 2014·Granted Nov 21, 2017·5 cites·2 claims
- 1079US10006547B2Piston ring and its production methodKK RIKEN·Filed 2014·Granted Jun 26, 2018·2 cites·7 claims
- 1178US9834831B2High rigid spheroidal graphite cast ironKK RIKEN·Filed 2013·Granted Dec 5, 2017·2 cites·8 claims
- 1276US10100929B2Piston ringKK RIKEN·Filed 2014·Granted Oct 16, 2018·1 cites·8 claims
- 1374US11746903B2Piston ring and method for manufacturing sameKK RIKEN·Filed 2021·Granted Sep 5, 2023·0 cites·18 claims
- 1474US10563548B2Sintered valve seatKK RIKEN·Filed 2016·Granted Feb 18, 2020·1 cites·19 claims
- 1572US11512777B2Piston ringKK RIKEN·Filed 2019·Granted Nov 29, 2022·0 cites·11 claims
- 1672US10295058B2Piston ringKK RIKEN·Filed 2016·Granted May 21, 2019·1 cites·12 claims
- 1772US10233793B2Valve seat of sintered iron-based alloyKK RIKEN·Filed 2015·Granted Mar 19, 2019·1 cites·10 claims
- 1871US10655208B2Sliding member and piston ringKK RIKEN·Filed 2016·Granted May 19, 2020·1 cites·6 claims
- 1970US2025215151A1Aromatic polyetherketone molded body and method of producing the sameKK RIKEN·Filed 2023·Application pending·0 cites
- 2069US12188564B2Piston ring, and method for manufacturing sameKK RIKEN·Filed 2021·Granted Jan 7, 2025·0 cites·19 claims
- 2169US9709169B2Piston ringKK RIKEN·Filed 2012·Granted Jul 18, 2017·1 cites·21 claims
- 2268US10670147B2Sliding member and piston ringKK RIKEN·Filed 2018·Granted Jun 2, 2020·1 cites·9 claims
- 2368US2026009113A1Ferritic stainless steelKK RIKEN·Filed 2024·Application pending·0 cites
- 2467US12535020B2Sliding memberKK RIKEN·Filed 2022·Granted Jan 27, 2026·0 cites·8 claims
- 2566US11946109B2Spheroidal graphite cast iron and method of producing spheroidal graphite cast iron, and vehicle undercarriage partsKK RIKEN·Filed 2020·Granted Apr 2, 2024·0 cites·9 claims
- 2666USD927574SSpacer for internal combustion enginesKK RIKEN·Filed 2019·Granted Aug 10, 2021·0 cites·1 claims
- 2766US10982767B2Piston ringKK RIKEN·Filed 2018·Granted Apr 20, 2021·1 cites·2 claims
- 2866US10036345B2Combination of cylinder and piston ringKK RIKEN·Filed 2013·Granted Jul 31, 2018·1 cites·9 claims
- 2966US9920836B2Piston ring for internal combustion engineKK RIKEN·Filed 2014·Granted Mar 20, 2018·1 cites·8 claims
- 3066US9657838B2Combined oil control ringKK RIKEN·Filed 2013·Granted May 23, 2017·4 cites·8 claims
- 3165US9410625B2Combined oil control ringKK RIKEN·Filed 2012·Granted Aug 9, 2016·1 cites·10 claims
- 3263US10823288B2Sliding member and piston ringKK RIKEN·Filed 2018·Granted Nov 3, 2020·0 cites·20 claims
- 3363US10557551B2Combined oil control ringKK RIKEN·Filed 2016·Granted Feb 11, 2020·1 cites·5 claims
- 3462US10670146B2Piston ring for combustion engineKK RIKEN·Filed 2016·Granted Jun 2, 2020·1 cites·14 claims
- 3560US11821524B2Combination of cylinder and piston ringKK RIKEN·Filed 2020·Granted Nov 21, 2023·0 cites·4 claims
- 3660US10502319B2Piston ring and its production methodKK RIKEN·Filed 2016·Granted Dec 10, 2019·0 cites·13 claims
- 3760US9506564B2Seal ringKK RIKEN·Filed 2012·Granted Nov 29, 2016·1 cites·5 claims
- 3860US2023303790A1Peek molded body and method of producing the sameKK RIKEN·Filed 2021·Application pending·0 cites
- 3959US10428943B2Side railKK RIKEN·Filed 2016·Granted Oct 1, 2019·1 cites·13 claims
- 4058US10508738B2Side railKK RIKEN·Filed 2016·Granted Dec 17, 2019·1 cites·1 claims
- 4158US10036472B2Sliding member and piston ringKK RIKEN·Filed 2017·Granted Jul 31, 2018·0 cites·12 claims
- 4258US9447879B2Piston ringKK RIKEN·Filed 2013·Granted Sep 20, 2016·0 cites·7 claims
- 4356US12476030B2Annular magnetic body for noise control and member for noise controlKK RIKEN·Filed 2022·Granted Nov 18, 2025·0 cites·3 claims
- 4456US11333245B2Oil control ring and spacer expanderKK RIKEN·Filed 2019·Granted May 17, 2022·0 cites·16 claims
- 4554US10745784B2High rigid spheroidal graphite cast ironKK RIKEN·Filed 2015·Granted Aug 18, 2020·0 cites·1 claims
- 4653US10352446B2Combined oil control ringKK RIKEN·Filed 2015·Granted Jul 16, 2019·0 cites·10 claims
- 4753US2016215882A1Pressure ringKK RIKEN·Filed 2014·Application pending·0 cites
- 4853US2025129847A1Piston ringKK RIKEN·Filed 2023·Application pending·0 cites
- 4953US2025180117A1Sliding mechanismKK RIKEN·Filed 2023·Application pending·0 cites
- 5052US2026013092A1Electromagnetic wave absorbing sheetKK RIKEN·Filed 2023·Application pending·0 cites
Showing the top 50 of 84 patent records by PatentIndex Score.
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →