Inventor · disambiguated record
Riki Okamoto
Also filed as: OKAMOTO RIKI
55 granted patents·4 pending applications·181 citations·filing 1997–2021
98Inventor score
Files withNIPPON STEEL CORP23NIPPON STEEL & SUMITOMO METAL CORP20OKAMOTO RIKI4YOKOI TATSUO3SANO KOHICHI2
Top patents by PatentIndex Score
59 records- 0197US10060006B2High-strength cold-rolled steel sheet having excellent local deformabilityNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Aug 28, 2018·4 cites·6 claims
- 0296US8951366B2High-strength cold-rolled steel sheet and method of manufacturing thereofSANO KOHICHI·Filed 2011·Granted Feb 10, 2015·19 cites·19 claims
- 0395US10066283B2High-strength cold-rolled steel sheet having excellent uniform elongation and hole expandabilityNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Sep 4, 2018·4 cites·6 claims
- 0495US9587319B2Hot-rolled steel sheet, cold-rolled steel sheet, galvanized steel sheet, and methods of manufacturing the sameNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Mar 7, 2017·3 cites·15 claims
- 0594US10167539B2Hot-rolled steel sheet and method for producing sameNIPPON STEEL & SUMITOMO METAL CORP·Filed 2017·Granted Jan 1, 2019·2 cites·20 claims
- 0693US9797024B2Hot-rolled steel sheet for gas nitrocarburizing and manufacturing method thereofNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Oct 24, 2017·2 cites·6 claims
- 0791US10724114B2High-strength cold-rolled steel sheet, high-strength hot-dip galvanized steel sheet and high-strength galvannealed steel sheetNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Jul 28, 2020·2 cites·9 claims
- 0891US10384251B2Burring processing methodNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Aug 20, 2019·4 cites·7 claims
- 0990US11447848B2Steel sheet and manufacturing method of thereforNIPPON STEEL CORP·Filed 2018·Granted Sep 20, 2022·2 cites·10 claims
- 1090US11377710B2Steel sheet and manufacturing method thereforNIPPON STEEL CORP·Filed 2018·Granted Jul 5, 2022·2 cites·12 claims
- 1190US9546413B2Hot-rolled steel sheet and production method thereofNOZAKI TAKAYUKI·Filed 2012·Granted Jan 17, 2017·4 cites·20 claims
- 1290US6544354B1High-strength steel sheet highly resistant to dynamic deformation and excellent in workability and process for the production thereofNIPPON STEEL CORP·Filed 1998·Granted Apr 8, 2003·41 cites·10 claims
- 1388US9567658B2Cold-rolled steel sheetTODA YURI·Filed 2012·Granted Feb 14, 2017·3 cites·12 claims
- 1487US6319338B1High-strength steel plate having high dynamic deformation resistance and method of manufacturing the sameNIPPON STEEL CORP·Filed 1997·Granted Nov 20, 2001·35 cites·11 claims
- 1586US10858719B2Steel sheetNIPPON STEEL CORP·Filed 2018·Granted Dec 8, 2020·1 cites·8 claims
- 1686US9273370B2Hot-rolled steel sheet, cold-rolled steel sheet, galvanized steel sheet, and methods of manufacturing the sameFUJITA NOBUHIRO·Filed 2011·Granted Mar 1, 2016·3 cites·10 claims
- 1785US9752217B2Hot-rolled steel sheet and method of producing the sameYOKOI TATSUO·Filed 2012·Granted Sep 5, 2017·3 cites·20 claims
- 1885US9512508B2High-strength cold-rolled steel sheet having excellent stretch flangeability and precision punchability and manufacturing method thereofSHUTO HIROSHI·Filed 2012·Granted Dec 6, 2016·5 cites·15 claims
- 1985US7501031B2Steel sheet for tin plated steel sheet and tin-free steel sheet each having excellent formability and manufacturing method thereofNIPPON STEEL CORP·Filed 2005·Granted Mar 10, 2009·4 cites·2 claims
- 2084US9631265B2Hot-rolled steel sheet and method for producing sameSANO KOHICHI·Filed 2012·Granted Apr 25, 2017·2 cites·10 claims
- 2183US9988697B2High-strength hot-rolled steel sheet having excellent local deformability and manufacturing method thereofSUWA YOSHIHIRO·Filed 2012·Granted Jun 5, 2018·2 cites·10 claims
- 2283US9453269B2Hot-rolled steel sheet for gas nitrocarburizing and manufacturing method thereofYOKOI TATSUO·Filed 2012·Granted Sep 27, 2016·2 cites·7 claims
- 2381US9458520B2Manufacturing method of a high-strength cold-rolled steel sheet having excellent uniform elongation and hole expandabilityTODA YURI·Filed 2012·Granted Oct 4, 2016·2 cites·9 claims
- 2478US8012276B2Method for manufacturing a steel sheet for tin plated steel sheet and tin-free steel sheet each having excellent formabilityNIPPON STEEL CORP·Filed 2008·Granted Sep 6, 2011·2 cites·4 claims
- 2577US9410231B2Steel sheet and method of manufacturing steel sheetOKAMOTO RIKI·Filed 2011·Granted Aug 9, 2016·2 cites·17 claims
- 2677US8182740B2High-strength steel sheets excellent in hole-expandability and ductilityOKAMOTO RIKI·Filed 2009·Granted May 22, 2012·2 cites·9 claims
- 2774US10266928B2Method for producing a cold-rolled steel sheetNIPPON STEEL & SUMITOMO METAL CORP·Filed 2017·Granted Apr 23, 2019·0 cites·13 claims
- 2874US7938917B2Method for controlling cooling of steel sheetNIPPON STEEL CORP·Filed 2005·Granted May 10, 2011·3 cites·13 claims
- 2974US7780799B2Cold-rolled steel sheet having a tensile strength of 780 MPA or more, an excellent local formability and a suppressed increase in weld hardnessNIPPON STEEL CORP·Filed 2004·Granted Aug 24, 2010·9 cites·3 claims
- 3071US10364478B2Bainite-containing-type high-strength hot-rolled steel sheet having excellent isotropic workability and manufacturing method thereofNIPPON STEEL & SUMITOMO METAL CORP·Filed 2017·Granted Jul 30, 2019·0 cites·4 claims
- 3168US11434555B2Hot-rolled steel sheetNIPPON STEEL CORP·Filed 2019·Granted Sep 6, 2022·0 cites·1 claims
- 3264US11198929B2Hot rolled steel sheet and method for producing sameNIPPON STEEL CORP·Filed 2018·Granted Dec 14, 2021·0 cites·17 claims
- 3364US7828912B2High-strength hot-rolled steel shaft excellent in hole expandability and ductility and production method thereofNIPPON STEEL CORP·Filed 2003·Granted Nov 9, 2010·5 cites·7 claims
- 3464US7780797B2High strength thin steel excellent in hole expansibility, ductility and chemical treatment characteristicsNIPPON STEEL CORP·Filed 2003·Granted Aug 24, 2010·5 cites·3 claims
- 3562US9347122B2Manufacturing method of a high-strength cold-rolled steel sheet having excellent local deformabilitySUWA YOSHIHIRO·Filed 2012·Granted May 24, 2016·0 cites·7 claims
- 3660US9587287B2Bainite-containing-type high-strength hot-rolled steel sheet having excellent isotropic workability and manufacturing method thereofYOKOI TATSUO·Filed 2012·Granted Mar 7, 2017·0 cites·6 claims
- 3759US12421567B2High-strength hot-rolled steel sheetNIPPON STEEL CORP·Filed 2021·Granted Sep 23, 2025·0 cites·6 claims
- 3859US11274355B2Hot rolled steel sheet and method for producing sameNIPPON STEEL CORP·Filed 2018·Granted Mar 15, 2022·0 cites·2 claims
- 3959US10294551B2High-strength low-specific-gravity steel sheet having superior spot weldabilityNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted May 21, 2019·0 cites·2 claims
- 4056US10336037B2Galvanized steel sheet and method for producing the sameNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Jul 2, 2019·0 cites·4 claims
- 4155US11408045B2Steel sheetNIPPON STEEL CORP·Filed 2018·Granted Aug 9, 2022·0 cites·2 claims
- 4254US8192683B2High-strength steel sheets excellent in hole-expandability and ductilityOKAMOTO RIKI·Filed 2003·Granted Jun 5, 2012·2 cites·10 claims
- 4353US11680303B2Steel sheet and manufacturing method thereforNIPPON STEEL CORP·Filed 2018·Granted Jun 20, 2023·0 cites·10 claims
- 4453US11118252B2Galvannealed steel sheetNIPPON STEEL CORP·Filed 2018·Granted Sep 14, 2021·0 cites·8 claims
- 4553US10513749B2Hot-rolled steel sheet and production method of thereforNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Dec 24, 2019·0 cites·4 claims
- 4653US9970074B2Cold-rolled steel sheet, galvanized cold-rolled steel sheet and method of manufacturing the sameNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted May 15, 2018·0 cites·14 claims
- 4752US11326234B2Cold-rolled steel sheet and hot-dip galvanized cold-rolled steel sheetNIPPON STEEL CORP·Filed 2017·Granted May 10, 2022·0 cites·7 claims
- 4851US11591675B2Steel sheet and method for producing sameNIPPON STEEL CORP·Filed 2018·Granted Feb 28, 2023·0 cites·3 claims
- 4950US10745775B2Galvannealed steel sheet and method for producing the sameNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Aug 18, 2020·0 cites·18 claims
- 5049US2019368002A1Steel sheet and process for producing sameNIPPON STEEL CORP·Filed 2018·Application pending·0 cites
Showing the top 50 of 59 patent records by PatentIndex Score.
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