Inventor · disambiguated record
Kotobu Nagai
Also filed as: NAGAI KOTOBU
13 granted patents·15 pending applications·70 citations·filing 1998–2018
89Inventor score
Files withTORIZUKA SHIRO6KANAI TAKAHIKO4NAT INST FOR MATERIALS SCIENCE4JP NAT RES INST FOR METALS2NAKAJIMA HIROSHI2
Top patents by PatentIndex Score
28 records- 0187US8932416B2High-strength and high-ductility die-quenched parts and method of manufacturing the sameNAKANISHI EIZABUROU·Filed 2010·Granted Jan 13, 2015·11 cites·9 claims
- 0273US6221178B1Ultra-fine grain steel and method for producing itNAT RES INST METALS·Filed 1998·Granted Apr 24, 2001·18 cites·22 claims
- 0365US6129791AOxides dispersion steel and making process thereofJP NATIONAL RESEARCH INST FOR·Filed 1999·Granted Oct 10, 2000·19 cites·10 claims
- 0464US2019099829A1Welding equipment for metallic materials and method for welding metallic materialsKANAI TAKAHIKO·Filed 2018·Application pending·0 cites
- 0563US8070888B2High strength formed article comprising hyperfine grain structure steel and manufacturing method of the sameTORIZUKA SHIRO·Filed 2006·Granted Dec 6, 2011·5 cites·4 claims
- 0661US9079266B2Welding equipment for metallic materials and method for welding metallic materialsKANAI TAKAHIKO·Filed 2009·Granted Jul 14, 2015·1 cites·13 claims
- 0761US2007119527A1Heavy wall steel material having superior weldability and method for producing the sameNAKAJIMA HIROSHI·Filed 2007·Application pending·0 cites
- 0860US2010173716A1Formed product and method for production thereofTORIZUKA SHIRO·Filed 2009·Application pending·0 cites
- 0960US2011083775A1Heavy wall steel material having superior weldability and method for producing the sameNAKAJIMA HIROSHI·Filed 2010·Application pending·0 cites
- 1057US2005178482A1Heavy wall steel material having superior weldability and method for producing the sameFiled 2005·Application pending·0 cites
- 1157US2008210351A1Formed product and method for production thereofTORIZUKA SHIRO·Filed 2008·Application pending·0 cites
- 1256US10189112B2Welding equipment for metallic materials and method for welding metallic materialsKANAI TAKAHIKO·Filed 2015·Granted Jan 29, 2019·0 cites·12 claims
- 1355US7647804B2Large strain-introducing working method and caliber rolling deviceNAT INST FOR MATERIALS SCIENCE·Filed 2004·Granted Jan 19, 2010·3 cites·4 claims
- 1454US6464807B1Production method of ultra fine grain steelJP NAT RES INST FOR METALS·Filed 2000·Granted Oct 15, 2002·3 cites·2 claims
- 1553US2010051144A1Excellent cold-workability exhibiting high-strength steel, wire or steel bar or high-strength shaped article, and process for producing themTORIZUKA SHIRO·Filed 2009·Application pending·0 cites
- 1649US2003145917A1Heavy wall steel material having superior weldability and method for producing the sameFiled 2003·Application pending·0 cites
- 1748US2009236015A1Ultrahigh strength steel sheet and strength part for automobile utilizing the sameNISSAN MOTOR·Filed 2007·Application pending·0 cites
- 1847US2005271496A1Formed product and method for production thereofNAT INST FOR MATERIALS SCIENCE·Filed 2003·Application pending·0 cites
- 1947US2002026969A1Heavy wall steel material having superior weldability and method for producing the sameFiled 2001·Application pending·0 cites
- 2044US2008041503A1Excellent Cold-Workability Exhibiting High-Strength Steel Wire or Steel Bar or High-Strength Shaped Article, and Process for Producing ThemTORIZUKA SHIRO·Filed 2005·Application pending·0 cites
- 2142US2009277539A1Steel for Warm Working, Warm Working Method Using the Steel, and Steel Material and Steel Component Obtainable TherefromKIMURA YUUJI·Filed 2006·Application pending·0 cites
- 2241US9498840B2Welding structural part and welding method of the sameKANAI TAKAHIKO·Filed 2010·Granted Nov 22, 2016·0 cites·12 claims
- 2341US2009185943A1Steel plate and steel plate coilNAT INST FOR MATERIALS SCIENCE·Filed 2007·Application pending·0 cites
- 2439US7727343B2Controlled warm-rolling methodNAT INST FOR MATERIALS SCIENCE·Filed 2004·Granted Jun 1, 2010·0 cites·20 claims
- 2536US6572716B2Fine ferrite-based structure steel production methodNAT RES INST METALS·Filed 1998·Granted Jun 3, 2003·3 cites·5 claims
- 2634US6332905B1High-strength metal solidified material and acid steel and manufacturing methods thereofJP NAT RES INST FOR METALS·Filed 1999·Granted Dec 25, 2001·7 cites·29 claims
- 2733US2006191613A1Warm rolling methodTORIZUKA SHIRO·Filed 2004·Application pending·0 cites
- 2825US6287397B1High strength phosphorus-containing steel and method for producing the sameJP NAT RES INST OF METALS·Filed 1999·Granted Sep 11, 2001·0 cites·4 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →